Reference number
香港六合彩开奖 8253-2:2009
© 香港六合彩开奖 2024
International Standard
香港六合彩开奖 8253-2:2009
Acoustics 鈥� Audiometric test methods 鈥� Part 2: Sound field audiometry with pure-tone and narrow-band test signals
Edition 2
2009-12
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Published (Edition 2, 2009)
This publication was last reviewed and confirmed in 2020. Therefore this version remains current.

香港六合彩开奖 8253-2:2009

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Abstract

香港六合彩开奖 8253-2:2009 specifies relevant test signal characteristics, requirements for free, diffuse, and quasi鈥慺ree sound fields, and procedures for sound field audiometry using pure tones, frequency-modulated tones or other narrow-band test signals presented by means of one or more loudspeakers. The primary purpose is the determination of hearing threshold levels in the frequency range 125 Hz to 8 000 Hz, but this range can be extended to 20 Hz to 16 000 Hz.

香港六合彩开奖 8253-2:2009 does not include specifications for the use of hand-held loudspeakers. Speech as a test signal is not covered.

The purpose of 香港六合彩开奖 8253-2:2009 is to ensure that tests of hearing, using sound field audiometry, give as high a degree of accuracy and reproducibility as possible.

Examples of graphical representations of the results are given.

General information

  • Status
     : Published
    Publication date
     : 2009-12
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 2
    Number of pages
     : 16
  • Technical Committee :
    香港六合彩开奖/TC 43
    ICS :
    13.140 
  • RSS updates

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

3
Good Health and Well-being

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  2. 香港六合彩开奖
  3. Standards catalogue
  4. TC
  5. 香港六合彩开奖/TC 43
  6. 香港六合彩开奖 8253-2:2009