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Phonak Holding AG was founded in 1985 as a holding company for the Phonak Group. In 1987 corporate headquarters were moved from Zurich to Stäfa . The company was floated on the SWX Swiss Exchange in 1994 and renamed Sonova Holding AG on 1 August 2007, although this change applied only to the holding company and in parts to the subsidiaries ...
The 27.12 MHz solid-state FM transmitter was capable of fitting into a shirt pocket. Said to be effective out to 100 feet (30 m), it mounted a flexible dangling antenna and a detachable dynamic microphone. The tube-based receiver incorporated a carrying drawer for the transmitter and a small monitor loudspeaker with volume control. [14] [15]
Some headphone cords are equipped with a serial potentiometer for volume control. Wired headphones may be equipped with a non-detachable cable or a detachable auxiliary male-to-male plug, as well as some with two ports to allow connecting another wired headphone in a parallel circuit, which splits the audio signal to share with another ...
Volume control can refer to: Volume controlled continuous mandatory ventilation; Potentiometer, a feature on audio equipment for adjusting the sound level
Headphone outputs and line outputs are sometimes confused. Different make and model headphones have widely varying impedances, from as little as 20 Ω to a few hundred ohms; the lowest of these will have results similar to a speaker, while the highest may work acceptably if the line out impedance is low enough and the headphones are sensitive ...
Noise-cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones that suppress unwanted ambient sounds using active noise control (ANC).. Active noise cancellation makes it possible to listen to audio content without raising the volume excessively.