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Cutaway drawing of a commercial 4-way transmission line loudspeaker system, the IMF Reference Standard Professional Monitor Mk VII (circa 1982). The enclosure is 104 cm (41 in) high (116 cm (46 in) on its stand), 43 cm (17 in) deep and 50 cm (20 in) wide, with a gross enclosure volume of about 218 liters.
A resonating device is a structure used by an animal that improves the quality of its vocalizations through amplifying the sound produced via acoustic resonance.The benefit of such an adaptation is that the call's volume increases while lessening the necessary energy expenditure otherwise required to make such a sound.
The term "acoustic resonance" is sometimes used to narrow mechanical resonance to the frequency range of human hearing, but since acoustics is defined in general terms concerning vibrational waves in matter, [1] acoustic resonance can occur at frequencies outside the range of human hearing.
Bose Acoustic Wave Music System CD-3000 with CD player and FM radio. The first "Wave" product was the "Acoustic Wave Music System" (AWMS-1), which was a tabletop mini-hifi system that was introduced in 1984. The AWMS-1 consisted of an AM/FM radio, cassette player, two 2-inch tweeters, and a four-inch woofer. [2]
A simple panel resonator can be built to hang on a wall by building a wooden frame, adding several inches of mineral wool to the inside, and fitting a sheet of plywood over the top attached only at the edges. A small gap should be left between the panel and the acoustic insulation so that the panel is free to resonate.
As of 2022 there are two known structures for thin-film bulk acoustic wave (BAW) resonators: free-standing [20] and solidly mounted (SMR) resonators. [21] In a free-standing resonator structure air is used to separate the resonator from the substrate/surrounding.
In the same way as a ported loudspeaker, a passive radiator system uses the sound pressure otherwise trapped in the enclosure to excite a resonance that makes it easier for the speaker system to create the deepest pitches (e.g., basslines). The passive radiator resonates at a frequency determined by its mass and the springiness (compliance) of ...
Four years later, the company officially re-introduced the Regal name [1] in Chicago, establishing their factory there. Lyon & Healy set Regal up as an independent company in 1924. During its first years of existence, Regal only marketed 4-string instruments such as ukuleles and tenor guitars. The production of 6-string guitars would begin later.
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