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Chapter 11. Detection of Signals in Noise
http://123.physics.ucdavis.edu/week_5_files/filters/matched_filter.pdf#:~:text=Noise%20is%20the%20unwanted%20electromagnetic%20energy%20that%20interferes,or%20it%20may%20be%20generated%20within%20the%20receiver.
A design guide for implementing audio signal detection ...
https://www.ednasia.com/a-design-guide-for-implementing-audio-signal-detection/
Principles of audio signal detection The human ear can hear frequencies in the approximate range of 20 Hz to 20,000 Hz. This range can include single tones such as transformer hum or white noise from radio systems. That’s hardly to say that these sounds are desirable in audio systems; a high level of such sounds can damage hearing.
A design guide for implementing audio signal detection
https://www.planetanalog.com/a-design-guide-for-implementing-audio-signal-detection/
Principles of audio signal detection The human ear can hear frequencies in the approximate range of 20 Hz to 20,000 Hz. This range can include single tones such as transformer hum or white noise from radio systems. That’s hardly to say that these sounds are desirable in audio systems; a high level of such sounds can damage hearing.
Speech or Noise? Using Signal Detection and Noise ...
https://hearingreview.com/inside-hearing/events/speech-or-noise-using-signal-detection-and-noise-reduction
Using Signal Detection and Noise Reduction. Jun 4, 2003 | Amplification, Events, Hearing Aids, People |. Listening in the presence of background noise has traditionally posed the greatest challenge for hearing aid wearers and is also a primary source of dissatisfaction with hearing aids. 1,2 Ideally, an intelligent hearing instrument would distinguish between speech …
Detection and Estimation of Signals in Noise
https://courses.washington.edu/ee506/handouts/slides1.pdf
The transmitted signal is only attenuated (α ≤ 1) and impaired by an additive white Gaussian noise (AWGN) process n(t). b) AWGN Channel with Unknown Phase s(t) α ejϕ n(t) r(t) r(t) = αejϕ s(t)+n(t) In this case, the transmitted signal also experiences an unknown phase shift ϕ. ϕ is often modeled as a random variable, which is
Algorithms and Techniques for Detecting Signals in Noise
http://g4jnt.com/SignalDetection.pdf
of a weak carrier in noise and either sound an alarm or start some recording software. A simple threshold detector on the AGC line, or an audio filter followed by a tone detector, is one means to detect signals that are strong enough to trigger the circuitry, but for signals that are buried right down in the noise these techniques will not work.
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