IEEE 661-1979
Method for determining objective loudness ratings of telephone connections

Standard No.

IEEE 661-1979

Release Date

1979

Published By

Institute of Electrical and Electronics Engineers (IEEE)

Status

Be replaced

Replace By

IEEE 661/COR-1997

Latest

IEEE 661-1997(R1998)

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.

IEEE 661-1979 history

• 0000 IEEE 661-1997(R1998)
• 1997 IEEE 661/COR-1997 Method for determining objective loudness ratings of telephone connections; Correction
• 1979 IEEE 661-1979 Method for determining objective loudness ratings of telephone connections
• 1978 IEEE 661-1978 Standard Method for Determining Objective Loudness Ratings of Telephone Connections