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2. Acoustic Research - Wikipedia

   en.wikipedia.org/wiki/Acoustic_Research

   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.

3. Wireless speaker - Wikipedia

   en.wikipedia.org/wiki/Wireless_speaker

   Wireless speakers are loudspeakers that receive audio signals using radio frequency (RF) waves rather than over audio cables. The two most popular RF frequencies that support audio transmission to wireless loudspeakers include a variation of WiFi IEEE 802.11 , while others depend on Bluetooth to transmit audio data to the receiving speaker.

4. List of loudspeaker manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_loudspeaker...

   PMC speakers: United Kingdom Polk Audio: United States ProAc: United Kingdom PSB Speakers: Canada QSC Audio Products: United States Quad Electroacoustics: United Kingdom (brand) Radio Shack: United States RCF audio: Italy Rectilinear Research Corporation: United States Rega Research: United Kingdom Renkus-Heinz: United States ReVox: Switzerland ...

5. Edgar Villchur - Wikipedia

   en.wikipedia.org/wiki/Edgar_Villchur

   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 ...

6. Loudspeaker enclosure - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker_enclosure

   Developed by Edgar Villchur in 1954, this technique was used in the very successful Acoustic Research line of bookshelf speakers in the 1960s–70s. The acoustic suspension principle takes advantage of this relatively linear spring. The enhanced suspension linearity of this type of system is an advantage. For a specific driver, an optimal ...

7. Loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker

   Wireless speakers are similar to wired powered speakers, but they receive audio signals using radio frequency (RF) waves rather than over audio cables. There is an amplifier integrated in the speaker's cabinet because the RF waves alone are not enough to drive the speaker. Wireless speakers still need power, so require a nearby AC power outlet ...

8. Transmission line loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Transmission_line_loudspeaker

   The concept was innovated within acoustic enclosure design, and originally termed an "acoustical labyrinth", by acoustic engineer and later Director of Research, Benjamin Olney, who developed the concept at the Stromberg-Carlson Telephone Co. in the early 1930s while studying the effect of enclosure shape and size on speaker output, including ...

9. Adaptive feedback cancellation - Wikipedia

   en.wikipedia.org/wiki/Adaptive_feedback_cancellation

   Adaptive feedback cancellation is a common method of cancelling audio feedback in a variety of electro-acoustic systems such as digital hearing aids. The time-varying acoustic feedback leakage paths can only be eliminated with adaptive feedback cancellation.