Description
The acoustic-suspension woofer (sometimes known as “air suspension”) uses the elastic cushion of air within a sealed enclosure to provide the restoring force for the woofer diaphragm.
Unlike the stiff suspension of conventional speakers, the trapped air inside the sealed-loudspeaker enclosure provides a more linear restoring force for the woofer's diaphragm, enabling it to oscillate a greater distance (excursion) in a linear fashion. This is a requirement for clean reproduction of deep-bass tones by drivers with relatively small cones (e.g. smaller than 12-16 inches in diameter) not mounted in a horn or similar for increased coupling at low frequencies enclosure. Acoustic suspension cabinets are not entirely airtight. A small amount of airflow must be allowed so the speaker can adjust to changes in atmospheric pressure.
Acoustic suspension woofers were once very popular in hi-fi systems, due to their low distortion. However, as bass reflex cabinet design has improved, speakers with ported enclosures have become more common, especially in home theater and mid-level stereo systems.
Read more about this topic: Acoustic Suspension
Famous quotes containing the word description:
“The type of fig leaf which each culture employs to cover its social taboos offers a twofold description of its morality. It reveals that certain unacknowledged behavior exists and it suggests the form that such behavior takes.”
—Freda Adler (b. 1934)
“An intentional object is given by a word or a phrase which gives a description under which.”
—Gertrude Elizabeth Margaret Anscombe (b. 1919)
“A sound mind in a sound body, is a short, but full description of a happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little the better for anything else.”
—John Locke (1632–1704)