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ITU-T - P.57

Artificial ears

active, Most Current
Organization: ITU-T
Publication Date: 1 June 2021
Status: active
Page Count: 116
scope:

This Recommendation specifies the artificial ears for telephonometric use. Four types are recommended, covering the different transducers, types, sizes and technologies.

The methods of use of the artificial ears are outside the scope of this Recommendation; however, some general rules are provided about the application force and the positioning of transducers.

Document History

P.57
June 1, 2021
Artificial ears
This Recommendation specifies the artificial ears for telephonometric use. Four types are recommended, covering the different transducers, types, sizes and technologies. The methods of use of the...
ITU-T P.57
February 1, 2021
Artificial ears
This Recommendation specifies the artificial ears for telephonometric use. Four types are recommended, covering the different transducers, types, sizes and technologies. The methods of use of the...
ITU-T P.57
December 1, 2011
Artificial ears
This Recommendation specifies the artificial ears for telephonometric use. Three types are recommended, covering the different transducers, types, sizes and technologies. The methods of use of the...
ITU-T P.57
April 1, 2009
Artificial ears
This Recommendation specifies the artificial ears for telephonometric use. Three types are recommended, covering the different transducers, types, sizes and technologies. The methods of use of the...
ITU-T P.57
January 27, 2005
Artificial ears
A description is not available for this item.
ITU-T P.57
July 1, 2002
Artificial ears
A description is not available for this item.
ITU-T P.57
August 1, 1996
Artificial Ears - Series P: Telephone Transmission Quality Objective Measuring Apparatus
A description is not available for this item.
P.57
January 1, 1993
Artificial Ears - Telephone Transmission Quality - Objective Measuring Apparatus - Corrigendum 1 (Study Group XII) 16 pp
A description is not available for this item.
P.57
January 1, 1993
Artificial Ears - Telephone Transmission Quality - Objective Measuring Apparatus
A description is not available for this item.
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References

This document references:
ASTM D2240 - Standard Test Method for Rubber Property-Durometer Hardness
Published by ASTM on August 1, 2015
This test method covers twelve types of rubber hardness measurement devices known as durometers: Types A, B, C, D, DO, E, M, O, OO, OOO, OOO-S, and R. The procedure for determining indentation...
This document references:
IEC 60318-1 - Electroacoustics – Simulators of human head and ear – Part 1: Ear simulator for the measurement of supra-aural and circumaural earphones
Published by IEC on August 1, 2009
This International Standard relates to the specification of an ear simulator which covers the frequency band 20 Hz to 10 000 Hz and is intended for calibrating supra-aural earphones used in...
This document references:
IEC 60318-4 - Electroacoustics – Simulators of human head and ear – Part 4: Occluded-ear simulator for the measurement of earphones coupled to the ear by means of ear inserts
Published by IEC on January 1, 2010
This part of IEC 60318 describes an occluded-ear simulator intended for the measurement of insert earphones in the frequency range from 100 Hz to 10 000 Hz. It is suitable for air conduction hearing...
This document references:
IEC 61260-1 - Electroacoustics – Octave-band and fractional-octave-band filters – Part 1: Specifications
Published by IEC on February 1, 2014
A description is not available for this item.
This document references:
ISO 3 - Preferred Numbers - Series of Preferred Numbers
Published by ISO on January 1, 1973
SCOPE AND FIELD OF APPLICATION This International Standard specifies series of preferred numbers.
This document is referenced by:
TS 103 737 - Speech and multimedia Transmission Quality (STQ); Transmission requirements for narrowband mobile wireless terminals (handset and headset) from a QoS perspective as perceived by the user
Published by ETSI on October 1, 2021
The present document provides speech transmission performance requirements for wireless terminals; it addresses several types of mobile wireless terminals, including softphones. The present document...
This document is referenced by:
TS 103 739 - Speech and multimedia Transmission Quality (STQ); Transmission requirements for wideband mobile wireless terminals (handset and headset) from a QoS perspective as perceived by the user
Published by ETSI on October 1, 2021
The present document provides speech transmission performance requirements for wireless terminals; it addresses several types of mobile wireless terminals, including softphones. The present document...
This document is referenced by:
EN 300 175-8 - Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 8: Speech and audio coding and transmission
Published by ETSI on March 1, 2022
The present document is one of the parts of the specification of the Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI). This part of the DECT CI specifies the speech and audio...
This document is referenced by:
EN 300 176-2 - Digital Enhanced Cordless Telecommunications (DECT); Test specification; Part 2: Audio and speech
Published by ETSI on May 1, 2022
The present document specifies the tests applicable to all Digital Enhanced Cordless Telecommunications (DECT) equipment accessing any DECT frequency band (including applicable IMT-2000 frequency...
This document is referenced by:
TS 103 224 - Speech and multimedia Transmission Quality (STQ); A sound field reproduction method for terminal testing including a background noise database
Published by ETSI on March 1, 2022
The quality of background noise transmission is an important factor, which significantly contributes to the perceived overall quality of speech. Terminals, networks, and system configurations...
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