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Microphones, amplifiers and recording systems all add some electronic noise to the signals passing through them, generally described as hum, buzz or hiss. All buildings have low-level magnetic and electrostatic fields in and around them emanating from mains supply wiring, and these can induce hum into signal paths, typically 50 Hz or 60 Hz (depending on the country's electrical supply standard ...
Electromagnetically induced acoustic noise (and vibration), electromagnetically excited acoustic noise, or more commonly known as coil whine, is audible sound directly produced by materials vibrating under the excitation of electromagnetic forces.
Professional audio equipment intended for use with balanced lines may have a ground lift switch for the cable shield. The ground lift switch eliminates unwanted hum and buzz by interrupting the ground loops between equipment, preventing current flow along the cable shield between two devices.
LED Light Buzzing Fixes. The primary cause of a buzzing LED light bulb is a discrepancy between the bulb wattage and that of the switch or dimmer. While this isn't dangerous, it can be really ...
Mains hum, electric hum, cycle hum, or power line hum is a sound associated with alternating current which is twice the frequency of the mains electricity.The fundamental frequency of this sound is usually double that of fundamental 50/60 Hz, i.e., 100/120 Hz, depending on the local power-line frequency.
Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort the signal to some degree. Noise rejection is the ability of a circuit to isolate an undesired signal component from the desired signal component, as with common-mode rejection ratio.
Numerous "recipes" for dealing with common sound issues, such as reducing or eliminating echo on sets, and removing line hum and buzz from recorded audio, are also provided. Eliva Silva writing for San Antonio Express-News said of the book:
“The way I like to work,” Navarro told me, “I almost like to throw too many ideas and too many parts on tape and then remove, take away, strip back. Not much got stripped back on that record ...