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This document specifies test requirements for the laboratory measurement of the sound insulation of
building elements and products, including detailed requirements for the preparation and mounting of
the test elements, and for the operating and test conditions. It also specifies the applicable quantities,
and provides additional test information for reporting.
The general procedures for airborne and impact sound insulation measurements are given in
ISO 10140-2 and ISO 10140-3, respectively.

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This document specifies laboratory test facilities and equipment for sound insulation measurements of
building elements, such as:
— components and materials;
— building elements;
— technical elements (small building elements);
— sound insulation improvement systems.
It is applicable to laboratory test facilities with suppressed radiation from flanking elements and
structural isolation between source and receiving rooms.
This document specifies qualification procedures for use when commissioning a new test facility
with equipment for sound insulation measurements. It is intended that these procedures be repeated
periodically to ensure that there are no issues with the equipment and the test facility.

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This document specifies the basic measurement procedures for airborne and impact sound insulation
of building elements in laboratory test facilities.

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This document specifies basic framework measurement methods for sound immission from sound
sources placed close to the ear. These measurements are carried out with a manikin, equipped
with ear simulators including microphones. The measured values are subsequently converted into
corresponding free-field or diffuse-field levels. The results are given as free-field related or diffusefield
related equivalent continuous A-weighted sound pressure levels. The technique is denoted the
manikin technique.
This document is applicable to exposure to sound from sources close to the ear, for example during
equipment tests or at the workplace to sound from earphones or hearing protectors with audio
communication facilities.
This document is applicable in the frequency range from 20 Hz to 10 kHz. For frequencies above 10 kHz,
ISO 11904-1 can be used.

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This document specifies methodology for qualifying acoustic spaces as anechoic and hemi-anechoic spaces meeting the requirements of a free sound field. This document specifies discrete-frequency and broad-band test methods for quantifying the performance of anechoic and hemi-anechoic spaces, defines the qualification procedure for an omni-directional sound source suitable for free-field qualification, gives details of how to present the results and describes uncertainties of measurement. This document has been developed for qualifying anechoic and hemi-anechoic spaces for a variety of acoustical measurement purposes. It is expected that, over time, various standards and test codes will refer to this document in order to qualify an anechoic or hemi-anechoic space for a particular measurement. Annex D provides guidelines for the specification of test parameters and qualification criteria for referencing documents. In the absence of specific requirements or criteria, Annex A provides qualification criteria and measurement requirements to qualify anechoic and hemi-anechoic spaces for general purpose acoustical measurements. This document describes the divergence loss method for measuring the free sound field performance of an acoustic environment.

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This document specifies a laboratory measurement method to determine noise radiated from a floor covering on a standard concrete floor when excited by a standard tapping machine.

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This document specifies a laboratory substitution method to determine the insertion loss without flow
of ducted, mainly absorbent, circular and rectangular silencers, as well as other duct elements for use
in ventilating and air-conditioning systems.
NOTE Laboratory measurement procedures for ducted silencers with superimposed flow are described in
ISO 7235[5].
This document is applicable to silencers where the design velocity does not exceed 15 m/s. As the
method does not include self-generated flow noise, this document is not suitable for tests on silencers
where this type of noise is of great importance for the evaluation of the silencer performance. As most
silencers, particularly in offices and dwelling, have design velocities below 15 m/s, this document can
often be a cost-efficient alternative to ISO 7235[5].
The insertion loss determined according to this document in a laboratory is not necessarily the same
as the insertion loss obtained in an installation in the field. Different sound and flow fields in the duct
yield different results. In this document, the sound field is dominated by plane wave modes. Due to the
use of regular test ducts, the results can include some flanking transmission via structural vibrations
in the duct walls that sets an upper limit to the insertion loss that can be determined.
This document is intended to be used for circular silencers with diameters of 80 mm to 2 000 mm or for
rectangular silencers with cross-sectional areas within the same range.

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This document specifies procedures for assessing the measurement uncertainty of sound insulation in
building acoustics. It provides for
— a detailed uncertainty assessment;
— a determination of uncertainties by inter-laboratory tests;
— an application of uncertainties.
Furthermore, typical uncertainties are given for quantities determined according to ISO 10140 (all parts),
ISO 16283 (all parts) and ISO 717 (all parts).

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ISO 10848 (all parts) specifies measurement methods to characterize the flanking transmission of one
or several building components. This document considers only laboratory measurements.
This part of ISO 10848 specifies measurement methods to be performed in a laboratory to characterize
the acoustic radiation of a building element when mechanically or acoustically excited. The measured
quantities can be used to compare products, or to express a requirement, or as input data for prediction
methods, such as ISO 12354-1 and -2.

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This document facilitates a standardized interpretation and a verifiably consistent software implementation of the sound propagation part of the calculation method CNOSSOS-EU:2015 according to ISO 17534-1. Other parts of CNOSSOS-EU:2015, such as the source models or the calculation method for aircraft noise, are beyond the scope of this document. This document provides an agreed interpretation of ambiguous aspects of the sound propagation part of CNOSSOS-EU:2015, a set of illustrative test cases along with reference solutions, and an example of a template form for the declaration of conformity for software manufacturers.

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This International Standard specifies an alternating airflow method for the determination of the airflow resistance[1] [2] of porous materials for acoustical applications.
Determination of the airflow resistance based on static flow is described in ISO 9053-1.

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EN-ISO 16283-2 specifies procedures to determine the impact sound insulation using sound pressure measurements with an impact source operating on a floor or stairs in a building. These procedures are intended for room volumes in the range from 10 m3 to 250 m3 in the frequency range from 50 Hz to 5 000 Hz. The test results can be used to quantify, assess and compare the impact sound insulation in unfurnished or furnished rooms where the sound field may or may not approximate to a diffuse field.

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This document specifies how to calculate:
— the uncertainty of sound absorption coefficients and equivalent sound absorption areas measured
according to ISO 354;
— the uncertainty of the practical and weighted sound absorption coefficients determined according
to ISO 11654;
— the uncertainty of the object sound absorption coefficient according to ISO 20189; and
— the uncertainty of the single number rating determined according to EN 1793-1.
Furthermore, the use of uncertainties in reporting measured or weighted sound absorption coefficients
is explained.

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This document specifies how to calculate: — the uncertainty of sound absorption coefficients and equivalent sound absorption areas measured according to ISO 354; — the uncertainty of the practical and weighted sound absorption coefficients determined according to ISO 11654; — the uncertainty of the object sound absorption coefficient according to ISO 20189; and — the uncertainty of the single number rating determined according to EN 1793‑1. Furthermore, the use of uncertainties in reporting measured or weighted sound absorption coefficients is explained.

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This document specifies procedures for assessing the measurement uncertainty of sound insulation in building acoustics. It provides for — a detailed uncertainty assessment; — a determination of uncertainties by inter-laboratory tests; — an application of uncertainties. Furthermore, typical uncertainties are given for quantities determined according to ISO 10140 (all parts), ISO 16283 (all parts) and ISO 717 (all parts).

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EN-ISO 80000-8 gives names, symbols, definitions and units for quantities of acoustics. Where appropriate, conversion factors are also given.

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This document applies to hearing aid fitting management (HAFM) services offered by hearing aid professionals (HAP) when providing benefit for their clients. The provision of hearing aids relies on the knowledge and practices of a hearing aid professional, to ensure the proper fitting and adequate service in the interest of the client with hearing loss. This document specifies general processes of HAFM from the client profile to the follow-up through administering, organising and controlling hearing aid fitting through all stages. It also specifies important preconditions such as education, facilities and systems that are required to ensure proper services. The focus of this document is the services offered to the majority of adult clients with hearing impairment. It is recognized that certain populations with hearing loss such as children, persons with other disabilities or persons with implantable devices can require services outside the scope of this document. This document generally applies to air conduction hearing aids and for the most part also to bone conduction devices. Hearing loss can be a consequence of serious medical conditions. Hearing aid professionals are not in a position to diagnose or treat such conditions. When assisting clients seeking hearing rehabilitation without prior medical examination, hearing aid professionals are expected to be observant of symptoms of such conditions and refer to proper medical care. Further to the main body of the document, which specifies the HAFM requirements and processes, several informative annexes are provided. Appropriate education of hearing aid professionals is vital for exercising HAFM. Annex A defines the competencies required for the HAFM processes. Annex B offers a recommended curriculum for the education of hearing aid professionals. Annex C is an example of an appropriate fitting room. Annex D gives guidance on the referral of clients for medical or other specialist examination and treatment. Annex E is a recommendation for important information to be exchanged with the client during the process of HAFM. Annex F is a comprehensive terminology list offering definitions of the most current terms related to HAFM. It is the intention that these annexes be helpful to those who wish to deliver HAFM of the highest quality.

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EN-ISO 389-7 in addition to ISO 16092-1, specifies the technical safety requirements and measures to be adopted by persons undertaking the design, manufacture and supply of pneumatic presses which are intended to work cold metal or material partly of cold metal. This document deals with all significant hazards relevant for pneumatic presses, when they are used as intended and under the conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4). All the phases of the lifetime of the machinery as described in ISO 12100:2010, 5.4, have been taken into consideration. The data are given in numerical form for the preferred frequencies in the one-third-octave series from 20 Hz to 16 000 Hz inclusive in accordance with ISO 266 and, in addition, for some intermediate audiometric frequencies up to 18 000 Hz. The threshold data differ from the audiometric zero specified in ISO 389-1, ISO 389-2, ISO 389-5 and ISO 389-8, since the latter refer to monaural listening through earphones with sound pressure levels referred to specified couplers and ear simulators. Direct comparison between the data in the parts of ISO 389 mentioned above and in this document is therefore not appropriate.

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This document provides requirements and supporting information on analysis of data collected in-situ through methods as specified in ISO/TS 12913-2.

  • Technical specification
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This document specifies a relatively simple engineering method for determining the sound power levels of small, movable noise sources. The methods specified in this document are suitable for measurements of all types of noise within a specified frequency range, except impulsive noise consisting of isolated bursts of sound energy which are covered by ISO 3744 and ISO 3745.

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This International Standard specifies the audio reproduction method for normalized loudness
level of audio sources for consumer equipment and systems.

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ISO 3743-2:2018 specifies a relatively simple engineering method for determining the sound power levels of small, movable noise sources. The methods specified in this document are suitable for measurements of all types of noise within a specified frequency range, except impulsive noise consisting of isolated bursts of sound energy which are covered by ISO 3744 and ISO 3745.
NOTE A classification of different types of noise is given in ISO 12001.

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This part of IEC 60268 specifies an acoustical measurement method that applies to electroacoustical
transducers and passive and active sound systems, such as loudspeakers, TV-sets,
multi-media devices, personal portable audio devices, automotive sound systems and
professional equipment. The device under test (DUT) can be comprised of electrical
components performing analogue and digital signal processing prior to the passive actuators
performing a transduction of the electrical input into an acoustical output signal. This
document describes only physical measurements that assess the transfer behaviour of the
DUT between an arbitrary analogue or digital input signal and the acoustical output at any
point in the near and far field of the system. This includes operating the DUT in both the small
and large signal domains. The influence of the acoustical boundary conditions of the target
application (e.g. car interior) can also be considered in the physical evaluation of the sound
system. This document does not assess the perception and cognitive evaluation of the
reproduced sound and the impact of perceived sound quality.
NOTE Some measurement methods defined in this document can be applied to headphones, headsets,
earphones and earsets in accordance with [1]1. This document does not apply to microphones and other sensors.
This document does not require access to the state variables (voltage, current) at the electrical terminals of the
transducer. Sensitivity, electric input power and other characteristics based on the electrical impedance will be
described in a separate future standard document, IEC 60268-22, dedicated to electrical and mechanical
measurements.

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This document gives guidance for the use of a set of twelve basic International Standards (see Tables 1,
2 and 3) describing various methods for determining sound power levels from all types of machinery,
equipment and products. It provides guidance on the selection of one or more of these standards,
appropriate to any particular type of sound source, measurement environment and desired accuracy.
The guidance given applies to airborne sound. It is for use in the preparation of noise test codes (see
ISO 12001) and also in noise emission testing where no specific noise test code exists. Such standardized
noise test codes can recommend the application of particular basic International Standard(s) and give
detailed requirements on mounting and operating conditions for a particular family to which the
machine under test belongs, in accordance with general principles given in the basic standards.
This document is not intended to replace any of the details of, or add any additional requirements to,
the individual test methods in the basic International Standards referenced.
NOTE 1 Two quantities which complement each other can be used to describe the noise emission of machinery,
equipment and products. One is the emission sound pressure level at a specified position and the other is the
sound power level. The International Standards which describe the basic methods for determining emission
sound pressure levels at work stations and at other specified positions are ISO 11200 to ISO 11205 (References
[20] to [25]).
NOTE 2 The sound energy level mentioned in ISO 3741 to ISO 3747 is not addressed in this document as it is
not mentioned in any legal requirement. Its application is limited to very special cases of a single burst of sound
energy or transient sound defined in ISO 12001.

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ISO 3740:2019 gives guidance for the use of a set of twelve basic International Standards (see Tables 1, 2 and 3) describing various methods for determining sound power levels from all types of machinery, equipment and products. It provides guidance on the selection of one or more of these standards, appropriate to any particular type of sound source, measurement environment and desired accuracy. The guidance given applies to airborne sound. It is for use in the preparation of noise test codes (see ISO 12001) and also in noise emission testing where no specific noise test code exists. Such standardized noise test codes can recommend the application of particular basic International Standard(s) and give detailed requirements on mounting and operating conditions for a particular family to which the machine under test belongs, in accordance with general principles given in the basic standards.
ISO 3740:2019 is not intended to replace any of the details of, or add any additional requirements to, the individual test methods in the basic International Standards referenced.
NOTE 1 Two quantities which complement each other can be used to describe the noise emission of machinery, equipment and products. One is the emission sound pressure level at a specified position and the other is the sound power level. The International Standards which describe the basic methods for determining emission sound pressure levels at work stations and at other specified positions are ISO 11200 to ISO 11205 (References [20] to [25]).
NOTE 2 The sound energy level mentioned in ISO 3741 to ISO 3747 is not addressed in this document as it is not mentioned in any legal requirement. Its application is limited to very special cases of a single burst of sound energy or transient sound defined in ISO 12001.

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ISO 3740:2019 gives guidance for the use of a set of twelve basic International Standards (see Tables 1, 2 and 3) describing various methods for determining sound power levels from all types of machinery, equipment and products. It provides guidance on the selection of one or more of these standards, appropriate to any particular type of sound source, measurement environment and desired accuracy. The guidance given applies to airborne sound. It is for use in the preparation of noise test codes (see ISO 12001) and also in noise emission testing where no specific noise test code exists. Such standardized noise test codes can recommend the application of particular basic International Standard(s) and give detailed requirements on mounting and operating conditions for a particular family to which the machine under test belongs, in accordance with general principles given in the basic standards. ISO 3740:2019 is not intended to replace any of the details of, or add any additional requirements to, the individual test methods in the basic International Standards referenced. NOTE 1 Two quantities which complement each other can be used to describe the noise emission of machinery, equipment and products. One is the emission sound pressure level at a specified position and the other is the sound power level. The International Standards which describe the basic methods for determining emission sound pressure levels at work stations and at other specified positions are ISO 11200 to ISO 11205 (References [20] to [25]). NOTE 2 The sound energy level mentioned in ISO 3741 to ISO 3747 is not addressed in this document as it is not mentioned in any legal requirement. Its application is limited to very special cases of a single burst of sound energy or transient sound defined in ISO 12001.

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This document specifies the measurement of the determination of the static airflow resistance[1,2], in a
laminar flow regime, of porous materials for acoustical applications.

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IEC TS 63001:2019 provides a technique of measurement and evaluation of ultrasound in liquids for use in cleaning devices and equipment. It specifies
• the cavitation measurement at 2,25 f0 in the frequency range 20 kHz to 150 kHz, and
• the cavitation measurement by extraction of broadband spectral components in the frequency range 10 kHz to 5 MHz.
IEC TS 63001:2019 covers the measurement and evaluation of the cavitation, but not its secondary effects (cleaning results, sonochemical effects, etc.).

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This document specifies the measurement of the determination of the static airflow resistance[1,2], in a laminar flow regime, of porous materials for acoustical applications.

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This document specifies a subjective method for measuring sound attenuation of hearing protectors
at the threshold of hearing. The method is a laboratory method designed to yield reproducible values
under controlled measurement conditions. The values reflect the attenuating characteristics of the
hearing protector only to the extent that users wear the device in the same manner as did the test
subjects.
For a more representative indication of field performance the methods of ISO/TS 4869-5 can be used.
This test method yields data which are collected at low sound pressure levels (close to the threshold
of hearing) but which are also representative of the attenuation values of hearing protectors at higher
sound pressure levels. An exception occurs in the case of amplitude-sensitive hearing protectors for
sound pressure levels above the point at which their level-dependent characteristics become effective.
At those sound pressure levels the method specified in this document is inapplicable, as it will usually
underestimate sound attenuation for these devices.
NOTE Due to masking from physiological noise in the occluded ear tests, sound attenuations below 500 Hz
can be overestimated by a few decibels.

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This document specifies three methods (the octave-band, HML and SNR methods) of estimating
the A-weighted sound pressure levels effective when hearing protectors are worn. The methods are
applicable to either the sound pressure level or the equivalent continuous sound pressure level of the
noise. Although primarily intended for steady noise exposures, the methods are also applicable to
noises containing impulsive components. It is possible that these methods could not be suitable for use
with peak sound pressure level measurements.
The octave-band, H, M, L or SNR values are suitable for establishing sound attenuation criteria for
selecting or comparing hearing protectors, and/or setting minimum acceptable sound attenuation
requirements.

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This document specifies requirements and supporting information on data collection and reporting for soundscape studies, investigations and applications. This document identifies and harmonizes the collection of data by which relevant information on the key components people, acoustic environment and context is obtained, measured and reported.

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This document specifies a standard reference zero for the scale of hearing threshold level applicable
to pure-tone air conduction audiometers, to promote agreement and uniformity in the expression of
hearing threshold level measurements throughout the world.
It states the information in a form suitable for direct application to the calibration of audiometers, that
is, in terms of the reference equivalent threshold sound pressure levels of generic supra-aural earphones
specified in 4.2, measured on an ear simulator complying with IEC 60318-1 and in terms of modelspecific
data given in two additional tables for the IEC 60318-3 acoustic coupler and the IEC 60318-1
ear simulator, respectively.
The data are based on an assessment of the information available from the various standardizing
laboratories responsible for audiometric standards and from scientific publications.
Some notes on the application and derivation of the reference levels are given in Annexes A and B.

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ISO 10848 (all parts) specifies measurement methods to characterize the flanking transmission of one
or several building components.
This document specifies laboratory and field measurements of buildings for Type B elements (defined
in ISO 10848-1) when the junction has a substantial influence.
Laboratory measurements are used to quantify the performance of the junction with suppressed
flanking transmission from the laboratory structure. Field measurements are used to characterize
the in situ performance and it is not usually possible to suppress unwanted flanking transmission
sufficiently; hence, the results can only be considered representative of the performance of that junction
when installed in that particular building structure.
This document is referred to in ISO 10848-1:2017, 4.5 as being a supporting part to the frame document
and applies to Type B elements that are structurally connected as defined in ISO 10848-1.
The measured quantities can be used to compare different products, or to express a requirement, or as
input data for prediction methods, such as ISO 12354-1 and ISO 12354-2.
The relevant quantity to be measured is selected according to ISO 10848-1:2017, 4.5. The performance
of the building components is expressed either as an overall quantity for the combination of elements
and junction (such as Dn,f,ij and/or Ln,f,ij and/or Lne0,f,ij) or as the normalized direction-average velocity
level difference Dv,ij,n of a junction. Dn,f,ij, Ln,f,ij, Lne0,f,ij and Dv,ij,n depend on the actual dimensions of
the elements.

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ISO 3743-2:2018 specifies a relatively simple engineering method for determining the sound power levels of small, movable noise sources. The methods specified in this document are suitable for measurements of all types of noise within a specified frequency range, except impulsive noise consisting of isolated bursts of sound energy which are covered by ISO 3744 and ISO 3745. NOTE A classification of different types of noise is given in ISO 12001.

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ISO 10848 (all parts) specifies measurement methods to characterize the flanking transmission of one
or several building components. These measurements are performed in a laboratory test facility or in
the field.
The performance of the building components is expressed either as an overall quantity for the
combination of elements and junction (such as the normalized flanking level difference and/or
normalized flanking impact sound pressure level) or as the vibration reduction index of a junction or
the normalized direction-average vibration level difference of a junction.
Two approaches are used for structure-borne sound sources in buildings, a normalized flanking
equipment sound pressure level and a transmission function that can be used to estimate sound
pressure levels in a receiving room due to structure-borne excitation by service equipment in a source
room. The former approach assumes that flanking transmission is limited to one junction (or no
junction if the element supporting the equipment is the separating element), and the latter considers
the combination of direct (if any) and all flanking transmission paths.
This document contains definitions, general requirements for test elements and test rooms, and
measurement methods. Guidelines are given for the selection of the quantity to be measured, depending
on the junction and the types of building elements involved. Other parts of ISO 10848 specify the
application for different types of junction and building elements.
The quantities characterizing the flanking transmission can be used to compare different products, or
to express a requirement, or as input data for prediction methods, such as ISO 12354-1 and ISO 12354-2.

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ISO 10848 (all parts) specifies measurement methods to characterize the flanking transmission of one
or several building components.
This document specifies laboratory and field measurements of buildings where at least one of the
elements that form the construction under test is a Type A element (defined in ISO 10848-1).
Laboratory measurements are used to quantify the performance of the junction with suppressed
flanking transmission from the laboratory structure. Field measurements are used to characterize
the in situ performance and it is not usually possible to suppress unwanted flanking transmission
sufficiently; hence, the results are primarily representative of the performance of that junction when
installed in that particular building structure.
The measured quantities can be used to compare different products, or to express a requirement, or as
input data for prediction methods, such as ISO 12354-1 and ISO 12354-2.

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ISO 10848 (all parts) specifies measurement methods to characterize the flanking transmission of one
or several building components. This document considers only laboratory measurements.
The measured quantities can be used to compare different products, or to express a requirement, or
as input data for prediction methods, such as ISO 12354-1 and ISO 12354-2. However, the measured
quantities Dn,f, Ln,f and Lne0,f only represent the performance with the dimensions for the test specimens
described in this document.
This document is referred to in ISO 10848-1:2017, 4.5 as being a supporting part of the frame document.
It applies to Type B elements as defined in ISO 10848-1, such as suspended ceilings, access floors,
light uninterrupted façades or floating floors. The transmission from one room to another can occur
simultaneously through the test element and via the plenum (if any). For measurements made according
to this document, the total sound transmission is determined and it is not possible to separate the two
kinds of transmission.

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This document describes how sound pressure levels intended as a basis for assessing environmental
noise limits or comparison of scenarios in spatial studies can be determined. Determination can be
done by direct measurement and by extrapolation of measurement results by means of calculation.
This document is primarily intended to be used outdoors but some guidance is given for indoor
measurements as well. It is flexible and to a large extent, the user determines the measurement effort
and, accordingly, the measurement uncertainty, which is determined and reported in each case. Thus,
no limits for allowable maximum uncertainty are set up. Often, the measurement results are combined
with calculations to correct for reference operating or propagation conditions different from those
during the actual measurement. This document can be applied on all kinds of environmental noise
sources, such as road and rail traffic noise, aircraft noise and industrial noise.

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As for the document predicting the structure borne sound levels produced in the buildings by service equipment (EN 12354 5:2009), this European standard covers sanitary installations, mechanical ventilation, heating and cooling, service equipment, lifts, rubbish chutes, boilers, blowers, pumps and other auxiliary service equipment, and motor driven car park doors; it can also be applied to other equipment attached to or installed in buildings. However, this standard is so far restricted to stationary sources.
This revised standard:
-   specifies laboratory measuring methods for determining the source input data required to calculate the source installed power, i.e. the equipment free velocity, the equipment blocked force and the equipment mobility;
-   defines the expression of the source installed power for any source-receiver mobility conditions, including lightweight and heavyweight receiving building elements. This power is used as input data in EN 12354 5:2009, which predicts the structure borne sound pressure level generated by the source installed in situ in a building;
-   defines a method to calculate the structure borne sound power generated by the equipment fictively mounted on two reference test rigs (respectively heavyweight and lightweight) ; the two results will inform the manufacturers on the difference in the equipment performance between these two common but very different situations;
-   does not now specify any method for the measurement of the source airborne sound power. If measurements of the equipment airborne sound power are required, then refer to EN ISO 3740, 47 and use the same source mounting conditions and operating conditions as in measuring using prEN 15657.
Throughout this standard the frequency range is limited to the 21 1/3 octave bands with mid-frequencies from 50 Hz to 5000 Hz.

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ISO 1996-2:2017 describes how sound pressure levels intended as a basis for assessing environmental noise limits or comparison of scenarios in spatial studies can be determined. Determination can be done by direct measurement and by extrapolation of measurement results by means of calculation. This document is primarily intended to be used outdoors but some guidance is given for indoor measurements as well. It is flexible and to a large extent, the user determines the measurement effort and, accordingly, the measurement uncertainty, which is determined and reported in each case. Thus, no limits for allowable maximum uncertainty are set up. Often, the measurement results are combined with calculations to correct for reference operating or propagation conditions different from those during the actual measurement. This document can be applied on all kinds of environmental noise sources, such as road and rail traffic noise, aircraft noise and industrial noise.

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