EN ISO 8253-3:1998

Acoustics - Audiometric test methods - Part 3: Speech audiometry (ISO 8253-3:1996)

Procedures and requirements for speech audiometry with the recorded test material being presented by air conduction through an earphone, by bone conduction through a bone vibrator or from a loudspeaker for sound field audiometry. It also contains requirements on recorded speech material and recommended procedures for the maintenance and calibration of speech audiometric equipment.

Akustik - Audiometrische Prüfverfahren - Teil 3: Sprachaudiometrie (ISO 8253-3:1996)

Diese Norm legt die Verfahren und Anforderungen für die Sprachaudiometrie mit aufgezeichnetem Sprachtestmaterial fest, das über Luftleistung durch einen Kopfhörer, über Knochenleitung durch einen Knochenleitungshörer oder über einen Lautsprecher für die Schallfeldaudiometrie angeboten wird. Die Methoden für den Einsatz von Rauschen, entweder zur Verdeckung am nichtgeprüften Ohr oder als Störgeräusch, werden beschrieben. Alle Prüfverfahren beruhen auf der Verwendung offener Prüfmaterialien.

Acoustique - Méthodes d'essais audiométriques - Partie 3: Audiométrie vocale (ISO 8253-3:1996)

Akustika - Avdiometrijske preskusne metode - 3. del: Govorna avdiometrija (ISO 8253-3:1996)

General Information

• Status: Withdrawn
• Publication Date: 17-Mar-1998
• Withdrawal Date: 29-Feb-2012
• ICS: 13.140 - Noise with respect to human beings
• Technical Committee: CEN/TC 211 - Acuostics
• Drafting Committee: CEN/TC 211 - Acuostics
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 01-Mar-2012
• Completion Date: 01-Mar-2012
• Ref Project: SIST EN ISO 8253-3:1999 - Acoustics - Audiometric test methods - Part 3: Speech audiometry (ISO 8253-3:1996)

Relations

• Replaced By: EN ISO 8253-3:2012 - Acoustics - Audiometric test methods - Part 3: Speech audiometry (ISO 8253-3:2012)
• Effective Date: 22-Dec-2008

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Akustika - Avdiometrijske preskusne metode - 3. del: Govorna avdiometrija (ISO 8253-3:1996)Akustik - Audiometrische Prüfverfahren - Teil 3: Sprachaudiometrie (ISO 8253-3:1996)Acoustique - Méthodes d'essais audiométriques - Partie 3: Audiométrie vocale (ISO 8253-3:1996)Acoustics - Audiometric test methods - Part 3: Speech audiometry (ISO 8253-3:1996)17.140.01Acoustic measurements and noise abatement in general13.140Vpliv hrupa na ljudiNoise with respect to human beingsICS:Ta slovenski standard je istoveten z:EN ISO 8253-3:1998SIST EN ISO 8253-3:1999en01-november-1999SIST EN ISO 8253-3:1999SLOVENSKI
STANDARD



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



SIST EN ISO 8253-3:1999



@ IS0 IS0 8253=3:1996(E) The interval between the test items depends upon the purpose of the speech test and the subject’s response mode and shall be stated. National authorities may determine the appropriate intervals (see 4.6). NOTE - The speech recognition score of a test subject may depend on the intervals between the test items. To make test results comparable to corresponding reference values, intervals should be used identical to those used during the determination of reference values. 11 Determination of speech detection threshold level 11 .l In monaural testing, start with the ear considered to be more sensitive. 11.2 Using connected speech as the test signal, let each test item be a segment of 1 s to 2 s duration, controlled by means of the interrupter switch of the equipment. The first item shall be presented at a sufficiently high level to evoke a definite response; e.g. 30 dB above the average of the subject’s pure tone hearing threshold levels at 500 Hz, 1 000 Hz and 2 000 Hz. 11.3 Reduce the level in steps of 20 dB until no response occurs. 11.4 Increase the level of the speech signal in steps of 5 dB and present one test item on each level until a response occurs. 11.5 After the response, decrease the level by 10 dB and then begin another ascent using steps of 5 dB until a response is given. 11.6 Repeat step 11.5 until three responses have occurred at the same level out of a maximum of five ascents. This level is the speech detection threshold level. 11.7 If less than three responses out of five ascents have been obtained at the same level, present a test item at a level 10 dB higher than the level of the last response. Then repeat steps 11.4 to 11.6 inclusive. 11.8 Proceed with the other ear if required. 11.9 A shortened version of this ascending method may be assumed to yield nearly equivalent results and may be appropriate in some cases. In this shortened version, continue the testing according to step 11.6 until at least two responses occur at the same level out of a maximum of three ascents. 12 Determination of speech recognition threshold level 12.1 General The procedures described below are based on two widely used step-sizes: 5 dB and 2 dB. Two alternative procedures are described: - a descending procedure using 5 dB steps, and - an alternative descending procedure using 2 dB or 5 dB steps. The procedures are expected to yield comparable results. However, experimental evidence for this is still unavailable. The procedures are identical from 12.1 .I to 12.1.3. Then, the descending procedure using 5 dB steps continues with 12.2 and the alternative procedure continues with 12.3. 9 SIST EN ISO 8253-3:1999



IS0 8253-3: 1996(E) NOTE - Spondees are often used as test items in many languages. 12.1 .l In monaural testing, start with the ear considered to be more sensitive. 12.1.2 The test subject shall be familiarized with the task prior to threshold determination by the presentation of a number of test items at a sufficiently high level to be clearly audible. A hearing level of speech of 20 dB to 30 dB above the average of the subject’s pure tone hearing threshold levels at 500 Hz, 1 000 Hz and 2 000 Hz is generally recommended. 12.1.3 Reduce the speech level in steps of 5 dB, presenting at least two test items on each level, until the test subject no longer responds correctly to all test items. Continue according to 12.2 or 12.3. 12.2 Descending procedure using 5 dB steps 12.2.1 Present a set of test items at the level where the subject ceased to respond correctly according to 12.1.3 and record the number of correct responses. A set of test items shall contain at least ten items. 12.2.2 If the subject scores at least 50 % on the set of test items, reduce the level in steps of 5 dB and present a new set of test items on each leve
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