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sound trap

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sound trap

[′sau̇nd ‚trap]
(electronics)
A wave trap in a television receiver circuit that prevents sound signals from entering the picture channels.
(engineering acoustics)
A pit between adjoining instrument sections in a sound-recording studio, generally filled with fiberglass panels, to absorb sound that would otherwise propagate from instruments in one section to microphones in adjacent sections.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

sound attenuator

In ductwork, a device (usually prefabricated) especially designed to provide much greater sound attenuation than would be provided by an equal length of ductwork; the pressure drop through the device is greater than for an equal length of ductwork.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive
Flies were trapped with a sound trap modelled after Walker's (1989) slit trap design.
The parasitoid fly Ormia ochracea (Diptera: Tachinidae) can use juvenile crickets as hosts
This short length was in the measurement room because a 5' section was required to exit the measurement room to join into the outlet sound trap. Because of space limitations outside the measurement room, the location of the sound trap was fixed.
Qualification of fan-generated duct rumble noise--part 1: test facility
Spring and fall catches, 200-2003, from the Long Island Sound Trawl Survey (LISTS) versus trawl catches in the Narrows (A) showed similar percentages by area as summer and fall 2003 catches from the Western Long Island Sound Trap Survey (B).
Long-term population trends in American lobster (Homarus americanus) and their relation to temperature in Long Island Sound
Sound Trap laminated steel, made by MSC Engineered Materials, is comprised of two steel skins, constrained over a layer of viscoelastic material that absorbs vibrational energy and reduces noise in end products.
Quiet steel laminate. (Application Xtra)
Other features include a 75 [ohms] IF amplifier load; a 33 V tuning voltage output; programmable charge-pump currents; in-lock detection; programmable reference divider ratios; outputs for band-switching and frequency-modulated sound trap switching; a five level, on chip A/D converter for digital automatic frequency control; and programming/interrogation via industry-standard control buses.
International report
Sound traps control the airborne noise in a duct while allowing the air itself to continue onward.
Tune Your HVAC System for Better Acoustics: KNOWING ACOUSTICAL CAUSES AND SOLUTIONS CAN HELP MAKE YOUR HVAC SYSTEM--ONE OF THE NOISIEST PARTS OF ARCHITECTURE--MORE ACOUSTICALLY PLEASING FOR OCCUPANTS
Since duct rumble is actually a low-frequency duct vibration issue, sound traps and in-duct active attenuation (sound canceling) are not useful in eliminating the ductwork vibration that causes duct rumble.
Understanding Duct Rumble
The motorised rolling doors come with tracks, sound traps and acoustic seals.
Gulf Region's first sound stage ready
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