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A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.
In acoustics, acoustic attenuation is a measure of the energy loss of sound propagation through an acoustic transmission medium. Most media have viscosity and are therefore not ideal media. When sound propagates in such media, there is always thermal consumption of energy caused by viscosity.
Re-mastering engineer Steve Hoffman has utilized the Legacy speakers on re-issues of Elvis Presley, Frank Sinatra and Nat King Cole. [5] Legacy Audio and Dudleston have been cited in publications such as Billboard, The Wall Street Journal, Stereophile, The Absolute Sound, Home Theater Magazine, and the Robb Report. [6]
Jim developed these high-power continuously variable L-pad attenuators as a means of controlling the overall volume of his amplifiers so that the output section could be overdriven at more modest sound pressure levels. One unique feature of these power attenuators is the remote footswitch which would allow the attenuator to be bypassed.
An attenuator is a passive broadband electronic device that reduces the power of a signal without appreciably distorting its waveform. An attenuator is effectively the opposite of an amplifier, though the two work by different methods. While an amplifier provides gain, an attenuator provides loss, or gain less than unity. An attenuator is often ...
In acoustics, Stokes's law of sound attenuation is a formula for the attenuation of sound in a Newtonian fluid, such as water or air, due to the fluid's viscosity.It states that the amplitude of a plane wave decreases exponentially with distance traveled, at a rate α given by = where η is the dynamic viscosity coefficient of the fluid, ω is the sound's angular frequency, ρ is the fluid ...
Most people enter military service “with the fundamental sense that they are good people and that they are doing this for good purposes, on the side of freedom and country and God,” said Dr. Wayne Jonas, a military physician for 24 years and president and CEO of the Samueli Institute, a non-profit health research organization.
[17] [18] The layout and sound is very close to the original, with the addition of enhancements such as MIDI and USB. [ 19 ] [ 20 ] In 2019, Superlative Instruments launched a Kickstarter campaign to produce the SB-1 Space Bee, [ 21 ] very similar in layout to the SH-101 with a unique keyboard design and all keys and keyboard in dark gray.
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