NF EN ISO 389-3

NF EN ISO 389-3

August 1999
Standard Cancelled

Acoustics. Reference zero for the calibration of audiometric equipment. Part 3 : reference equivalent threshold force levels for pure tones and bone vibrators.

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Main informations

Collections

National standards and national normative documents

Thematics

Gestion des risques et SST, QSE, Sécurité

Publication date

August 1999

Number of pages

17 p.

Reference

NF EN ISO 389-3

ICS Codes

13.140   Noise with respect to human beings

Classification index

S30-007-3

Print number

1 - 09/06/2005

International kinship

European kinship

EN ISO 389-3:1998
Replaced standards (1)
NF EN 27566
February 1992
Standard Cancelled
Acoustics. Standard reference zero for the calibration of pure-tone bone conduction audiometers.

La présente norme spécifie les données suivantes applicables à l'étalonnage des ossivibrateurs pour l'audiométrie à sons purs en conduction osseuse : les niveaux de référence équivalents de force liminaire correspondant au seuil d'audition de sujets jeunes otologiquement normaux (voir 3.9) par audiométrie en conduction osseuse ; les caractéristiques principales de l'ossivibrateur et de sa méthode de couplage au sujet soumis à l'essai et au coupleur mécanique ; les caractéristiques principales et le niveau repère du bruit de masque appliqué à l'oreille non testée.

Standard replaced by (1)
NF EN ISO 389-3
April 2016
Standard Current
Acoustics - Reference zero for the calibration of audiometric equipment - Part 3 : reference equivalent threshold vibratory force levels for pure tones and bone vibrators

<p>ISO 389-1:2016 specifies the following data applicable to the calibration of bone vibrators for pure-tone bone-conduction audiometry:</p> <p>a) reference equivalent threshold vibratory force levels (RETVFL), corresponding to the threshold of hearing of young otologically normal persons by bone-conduction audiometry;</p> <p>b) essential characteristics of the bone vibrator and the method of coupling to the test subject, and to the mechanical coupler;</p> <p>c) essential characteristics of the masking noise and the baseline masking noise level applied to the ear not under test.</p> <p>Guidance on the practical application of this part of ISO 389 in the calibration of audiometers is given in Annex B.</p> <p>RETVFL is the vibratory force level transmitted to a mechanical coupler of specified characteristics by a vibrator when applied to the mechanical coupler under stated conditions of test and when energized at the voltage level corresponding to the normal threshold of hearing for location on the mastoid prominence.</p> <p>NOTE 1 Values for the differences in reference equivalent threshold vibratory force levels between location on the forehead and mastoid are included for information in Annex C.</p> <p>NOTE 2 Recommended procedures for carrying out bone-conduction audiometry are specified in ISO 8253‑1.</p>

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