Noise suppression algorithms can degrade speech quality in non-stationary noise

Evidence

Telecommunication devices, such as mobile phones, often involve algorithms to suppress background noise using non-linear DSP methods with time-variant processing. An unwanted side effect is that the noise suppression algorithms may also degrade the quality of speech, especially if the background noise is non-stationary. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2452

Categorization

• XREF: Connects to the reader’s noise-and-silence corpus: noise-canceling and suppression technologies as a form of sonic intervention that introduces its own failures, echoing Hempton’s anti-noise-device critique. — connects to: Improving speech intelligibility via noise reduction outweighs equivalent improvement of the target signal. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3536; Speech models built on optimal listening neglect constant signal degradation; Long-term averaging of spectra suppresses random background noise — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1431 (+2 more)
• corroborated: 2 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2452