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Regenerated noise should always be reviewed, but it is usually only a concern in very quiet rooms (e.g. concert halls, recording studios, music rehearsal rooms) or when the ductwork velocity is greater than 1500 ft/m. [4] There is a prediction formula that can be used to estimate duct silencer regenerated noise if no data exists [13] [14]
Using a combination of sound absorption materials, arrays of microphones and speakers, and a digital processor, a restaurant operator can use a tablet computer to selectively control noise levels at different places in the restaurant: the microphone arrays pick up sound and send it to the digital processor, which controls the speakers to output ...
A pair of headphones being tested inside an anechoic chamber for soundproofing. Soundproofing is any means of impeding sound propagation.There are several methods employed including increasing the distance between the source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles for absorption, or using ...
Acoustic liners at the intake of a jet engine A composite sandwich acoustic liner (A) with perforate face-sheet (B) honeycomb core (C) and back-skin (D). Aircraft engines, typically turbofans, use acoustic liners to damp engine noise.
A fanless CPU cooler based on heat pipe technology. A quiet, silent or fanless PC is a personal computer that makes very little or no noise.Common uses for quiet PCs include video editing, sound mixing and home theater PCs, but noise reduction techniques can also be used to greatly reduce the noise from servers.
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All of the ways your presentation could go wrong swirl in your mind. Yesterday's tense exchange with your boss plays on a loop. Worry about the threat of layoffs, a recent parenting mishap, and an ...
Meanwhile, local residents Jenn and Chris Wiley said at first they thought the noise might have been a sonic boom. "We were just sat watching the television and there was a really loud bang.