IEEE 661-1979 IEEE Standard Method for Determining Objective Loudness Ratings of Telephone Connections

IEEE 661-1979 IEEE Стандартный метод для определения Objective Loudness Рейтинги телефонных соединений

The procedures given in this standard may be used for determining 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 connectiond comprising transmitting, receiving, or connection paths, the procedures involve measurement of acoustics pressures and electric voltages.