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The two most common types of speaker enclosure are acoustic suspension (sometimes called pneumatic suspension) and bass reflex.In both cases, the tuning affects the lower end of the driver's response, but above a certain frequency, the driver itself becomes the dominant factor and the size of the enclosure and ports (if any) become irrelevant.
Villchur's speaker systems provided improved bass response while reducing the speaker's cabinet size. Acoustic Research, Inc. (AR), of which he was president from 1954 to 1967, manufactured high-fidelity loudspeakers, turntables, and other stereo components of his design, and demonstrated their quality through "live vs. recorded" concerts. The ...
A dead or inert acoustic may be best, especially if properly filled with 'surround' reproduction, so that the reverberant field of the original space is reproduced realistically. This is currently quite hard to achieve, and so the ideal loudspeaker systems for stereo reproduction would have a uniform dispersion at all frequencies.
The expression / can be replaced by the value 9.523×10 −7 s 3 /m 3 for dry air at 25 °C. For 25 °C air with 50% relative humidity the expression evaluates to 9.438×10 −7 s 3 /m 3. From the efficiency, we may calculate sensitivity, which is the sound pressure level a speaker produces for a given input:
Transmission Audio [31] Audio Reference (Acoustic Zen line) [32] Radford [33] DIY kit manufacturers: UK – IPL Acoustics , Falcon Acoustics "Thor" USA – GR Research "N3" USA – New York Acoustics, loosely associated with New York Audio Labs , kits and plans for 8" and 10" driver TL speaker cabinets, active in the mid 1980s.
This gives a pressure-to-volume velocity change ratio in the range of 8:1 to 10:1, which serves to match the impedance of the diaphragm to the horn throat. [8] [14] A larger slot area admits more sound wave energy but also reflects more energy backward onto the diaphragm. A smaller slot area traps more wave energy between the phase plug and the ...
After this, they jointly decided to manufacture the new speaker design which became known as the "AR-1", the first commercial acoustic-suspension loudspeaker system. Villchur was 100% responsible for the design and patent of the system; Kloss was responsible for perhaps 75% of the mechanical design of the speaker cabinet and system. [3]
Acoustic Research was a Cambridge, Massachusetts-based company that manufactured high-end audio equipment. The brand is now owned by VOXX.Acoustic Research was known for the AR-3 series of speaker systems, which used the 12 in (300 mm) acoustic suspension woofer of the AR-1 with newly designed dome mid-range speaker and high-frequency drivers.