DS/EN ISO 389-3:2016

Akustik - Nulpunktsreference ved kalibrering af audiometre - Del 3: Høretærskler for rene toner målt med benledningsvibratorer


Status:
Gældende
Type:
Standard
Sprog:
Engelsk
Pris fra:
kr. 454,00

Beskrivelse

This part of ISO 389 specifies the following data applicable to the calibration of bone vibrators for puretone
bone-conduction audiometry. Guidance on the practical application of this part of ISO 389 in the
calibration of audiometers is given in Annex B.
a) Reference equivalent threshold vibratory force levels (RETVFLs), corresponding to the threshold
of hearing of young otologically normal persons by bone-conduction audiometry. RETVFL is the
vibratory force level transmitted to a mechanical coupler of specified characteristics (see 5.4) 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.
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.
b) Essential characteristics of the bone vibrator and the method of coupling to the test subject, and to
the mechanical coupler.
c) Essential characteristics and the baseline masking noise level applied to the ear not under test.
NOTE 2 – Recommended procedures for carrying out bone-conduction audiometry are specified in ISO 8253‑1.


Antal sider: 26

Udgivet: 2016-03-16

Godkendelsesdato: 2016-02-29

Internationale relationer : EN ISO 389-3:2016 IDT ISO 389-3:2016 IDT

ICS: 13.140 - Støj. Virkning på mennesket

Varenummer: M288841


Udvalg og komiteer

Komite

  • CEN/TC 211
  • ISO/TC 43
  • ISO/TC 43/WG 1

Dansk udvalg

DS/S-115