Working Group Details
CEA - Working Group on Communication Electroacoustics
|Working Group Chair||
|IEEE Program Manager|
IEEE 661-1979 - IEEE Standard Method for Determining Objective Loudness Ratings of Telephone Connections
To describe a practical and reproducible method of determining the loudness ratings of telephone connections. Loudness ratings may be measured directly using appropriate test instruments and facilities, as specified in this standard, or may be computed using the amplitude-frequency characteristic of the connection measured in accordance with IEEE Std 269-1971. .
IEEE 269a-2012 - IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets--Amendment 1
Practical methods for making laboratory measurements of electroacoustic characteristics of analog and digital telephones, handsets, and headsets are presented. The methods may also be applicable to a wide variety of other communications equipment, including cordless, wireless, and mobile communications devices. Measurement results may be used to evaluate these devices on a standardized basis. Application is in the frequency range from 100 Hz to 8500 Hz.