A Measurement Method of Hum Modulation Caused by a Loudspeaker's Electromotive Force

Takahashi S, Tanaka S. A Measurement Method of Hum Modulation Caused by a Loudspeaker's Electromotive Force. In: AES Convention 70. Audio Engineering Society; 1981. Paper 1823. Available from: https://aes.org/publications/elibrary-page/?id=11931

@inproceedings{Takahashi1981_11931,
  author = {Takahashi, Susumu and Tanaka, Susumu},
  title = {{A Measurement Method of Hum Modulation Caused by a Loudspeaker's Electromotive Force}},
  booktitle = {AES Convention 70},
  note = {Paper 1823},
  year = {1981},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11931}
}

TY  - CPAPER
TI  - A Measurement Method of Hum Modulation Caused by a Loudspeaker's Electromotive Force
AU  - Takahashi, Susumu
AU  - Tanaka, Susumu
T2  - AES Convention 70
M1  - Paper 1823
PY  - 1981
DA  - 1981/10/06
UR  - https://aes.org/publications/elibrary-page/?id=11931
PB  - Audio Engineering Society
LA  - en
AB  - This paper describes a new kind of power amplifier distortion caused by a loudspeaker's electromotive force. This distortion is a type of intermodulation distortion that arises from modulation of the power frequency and its harmonics by the reverse current flowing from the loudspeaker to the amplifier. This problem is pronounced around a speaker's resonant frequency, where the reverse current can nearly equal the applied current. Unlike conventional distortion measurements, our method uses test signals fed to the output terminals at which the distortion is measured. This paper also describes the relationship between the type of loudspeaker and the amount of electromotive current.
ER  -