Low Frequency Noise Reduction by Synchronous Averaging under Asynchronous Measurement System in Real Sound Field

Suzuki T, Koide H, Shoji A, Tsuchiya K, Endo T, Hino S. Low Frequency Noise Reduction by Synchronous Averaging under Asynchronous Measurement System in Real Sound Field. In: AES Convention 133. Audio Engineering Society; 2012.pp. 8707:1-. Available from: https://aes.org/publications/elibrary-page/?id=16449

@inproceedings{Suzuki2012_16449,
  author = {Suzuki, Takuma and Koide, Hiroshi and Shoji, Akihiko and Tsuchiya, Kouichi and Endo, Tomohiko and Hino, Shokichiro},
  title = {{Low Frequency Noise Reduction by Synchronous Averaging under Asynchronous Measurement System in Real Sound Field}},
  booktitle = {AES Convention 133},
  pages = {8707:1-},
  year = {2012},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16449}
}

TY  - CPAPER
TI  - Low Frequency Noise Reduction by Synchronous Averaging under Asynchronous Measurement System in Real Sound Field
AU  - Suzuki, Takuma
AU  - Koide, Hiroshi
AU  - Shoji, Akihiko
AU  - Tsuchiya, Kouichi
AU  - Endo, Tomohiko
AU  - Hino, Shokichiro
T2  - AES Convention 133
SP  - 1
M1  - Paper 8707
PY  - 2012
DA  - 2012/10/06
UR  - https://aes.org/publications/elibrary-page/?id=16449
PB  - Audio Engineering Society
LA  - en
AB  - An important feature in synchronous averaging is the synchronization of sampling clock between the transmitting and receiving devices (e.g., D/A and A/D converters). However, in the case where the devices are placed apart, synchronization becomes difficult to gain. For such circumstances, an effective method is proposed that enables synchronization for an asynchronous measurement environment. Normally, a swept-sine is employed as a measuring signal but because its power spectrum is flat, the signal-to-noise ratio (SNR) is decreased in a real environment with high levels of low frequency noise. To solve this, the devised method adopts the means of “enhancing the signal source power in low frequencies” and “placing random fluctuations in the repetitive period of signal source.” Subsequently, its practicability was verified.
ER  -