ANSI/IEEE 661:1979
Standard Method for Determining Objective Loudness Ratings of Telephone Connections

Standard No.

ANSI/IEEE 661:1979

Release Date

1979

Published By

American National Standards Institute （ANSI)

Latest

ANSI/IEEE 661:1979

Scope

Determines the loudness rating of partial and complete telephone connections. For complete telephone connections, comprising overall and sidetone transmission paths, the procedures involve measurement of acoustic input and output pressures. For partial telephone connections comprising transmitting, receiving, or connection paths, the procedures involve measurement of acoustics pressures and electric voltages.

ANSI/IEEE 661:1979 history

• 1979 ANSI/IEEE 661:1979 Standard Method for Determining Objective Loudness Ratings of Telephone Connections