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Sound reflections: by limiting the reflection using many methods, e.g. by using acoustic absorption (deadening) materials, trapping the sound, opening a "window" to let sound out, etc. By analyzing the entire sequence of events, from the source to the observer, an acoustic engineer can provide many ways to quieten the machine.
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 ...
A sound masking system can be used to reduce the impression of intruding sound (reducing annoyance, distraction) and improve acoustic privacy (including speech privacy). However, there is a fundamental misconception in the deployment of a sound masking system in treating areas where there is a failure to appreciate the difference between the ...
Acoustic harassment and acoustic deterrents are technologies used to keep animals [1] and in some cases humans away from an area. Applications of the technology are used to keep marine mammals away from aquaculture facilities and to keep birds away from certain areas (for instance in the vicinity of airports and blueberry fields).
Peal board in St Michael and All Angels' church, Penkridge, Staffordshire, recording the first peal on the new bells in 1832. In campanology (bell ringing), a peal is the special name given to a specific type of performance of change ringing which meets certain exacting conditions for duration, complexity and quality.
In mechanical engineering, a face seal is a seal in which the sealing surfaces are normal to the axis of the seal. Face seals are typically used in static applications and are used to prevent leakage in the radial direction with respect to the axis of the seal. [1] Face seals are often located in a groove or cavity on a flange. Face seals are a ...
Center peel during patrol formation and contact drills training in the US Navy. A peel (sometimes nicknamed an Australian peel [1] or Aussie Peeloff [2]) is a type of retreat conducted by infantry which allows them to maintain effective defensive suppressive fire while retreating. [3]
Skywalker Sound was founded as Sprocket Systems in San Anselmo, California. While located in San Anselmo, Sprocket Systems came into contact with the local residents from time to time. For instance, Kentfield resident Pat Welsh was "discovered" while shopping at a camera store and went on to provide the voice for E.T.