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In general, soft grilles impose little resistance on the speaker driver because the material is free to move synchronously with the sound waves. Because the grille is capable of absorbing this vibration, softer grilles are (in general) less prone to rattling except at extremely high sound pressure levels .
A significant increase in the effective volume of a closed-box loudspeaker can be achieved by a filling of fibrous material, typically fiberglass, bonded acetate fiber (BAF) or long-fiber wool. The effective volume increase can be as much as 40% and is due primarily to a reduction in the speed of sound propagation through the filler material as ...
A small amount of polyfill. Polyester fiberfill is a synthetic fiber used for stuffing pillows [1] and other soft objects such as stuffed animals. [2] It is also used in audio speakers for its acoustic properties. [3]
Speakers may need to be unobtrusive to blend in with antique woodwork and stonework. In some cases, audio designers have designed custom-painted speaker cabinets. Some facilities, such as sanctuaries or chapels are long rooms with low ceilings and additional fill-in speakers are needed throughout the room to give good coverage. Once installed ...
Some speaker designs also use a spiral or elliptic spiral shaped duct, usually with one speaker element in the front or two speaker elements arranged one on each side of the cabinet. Depending upon the drive unit, and quantity and various physical properties of absorbent material, the amount of taper will be adjusted during the design process ...
EVA is also sometimes used as a material for some plastic model kit parts. One common use of EVA foam rubber is in low frequency (woofer) speaker cone membrane support rings [11] (replacing rubber) because of its good mechanical and acoustic properties. Open cell EVA foam is used to damp high frequency acoustical diffraction from tweeter ...
The House speakership drama enters a second week under increased urgency as Israel declared war Sunday following unprecedented surprise attacks by Hamas.
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