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Transient Noise
Transient noise pulses consist of a relatively short pulse followed by decaying low frequency oscillations. The initial peak is often due to an impulse interference, and the following oscillations are due to resonance on the channel that received the initial pulse. The source of these noise pulses is often channel interference. See also *Transient (acoustics) In acoustics and audio, a transient is a high amplitude, short-duration sound at the beginning of a waveform that occurs in phenomena such as musical sounds, noises or speech. Transients do not necessarily directly depend on the frequency of the to ... Noise (electronics) {{sound-tech-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impulse Noise (audio)
Impulse noise is a category of ( acoustic) noise that includes unwanted, almost instantaneous (thus impulse-like) sharp sounds (like clicks and pops)—typically caused by electromagnetic interference, scratches on disks, gunfire, explosions, and synchronization issues in digital audio. High levels of such a noise (200+ decibels) may damage internal organs, while 180 decibels are enough to damage human ears. An impulse noise filter can enhance the quality of noisy signals to achieve robustness in pattern recognition and adaptive control systems. A classic filter used to remove impulse noise is the median filter, at the expense of signal degradation. Thus it's quite common to get better performing impulse noise filters with model-based systems, which are programmed with the time and frequency properties of the noise to remove only impulse obliterated samples. See also * Audio synchronizer * Crackling noise * Record restoration * Gaussian noise Gaussian noise, named after Car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transient (acoustics)
In acoustics and audio, a transient is a high amplitude, short-duration sound at the beginning of a waveform that occurs in phenomena such as musical sounds, noises or speech. Transients do not necessarily directly depend on the frequency of the tone they initiate. It contains a high degree of non-periodic components and a higher magnitude of high frequencies than the harmonic content of that sound. Transients are more difficult to encode with many audio compression algorithms, causing pre-echo. Sonar The term ''transient'' is used by military sonar operators to describe unexpected sounds emanating from another vessel such as operating machinery, a metal hatch being slammed, or the flooding and pressurization of torpedo or vertical launch tubes. See also * Prefix (acoustics) * Impulse function * Onset (audio) * Transient response In electrical engineering and mechanical engineering, a transient response is the response of a system to a change from an equilibrium or a stea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |