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The "2201" was released in 1966 and was Bose's first speaker system. [20] It consisted of 22 five-inch drivers and was designed to be located in the corner of a room, using reflections off the walls and floor to disperse the sound. [21] The system included tone controls and a switch to attenuate frequencies below 50 Hz.
Hertz Systems Ltd is a Polish company based in Zielona Gora that utilizes space technology for both the military and civilian markets, primarily relying on GPS navigation. Hertz Systems cooperates with, among others, the European Space Agency , [ 1 ] the Polish Space Agency , the Space Research Center of Polish Academy of Sciences and NATO ...
The Android software app, AquaApp, from University of Washington uses the microphones and speakers on existing smartphones and smart watches to enable underwater acoustic communication. [31] It had been tested to send digital messages using smartphones between divers at distances of up to 100 m.
Daniel Hertz S.A. is a high-performance audio company based in Switzerland. The company makes high-efficiency loudspeakers, power amplifiers, pre-amplifiers, integrated amplifiers, and audio processing software. Daniel Hertz provides consulting services to major companies like LG Electronics of Korea and semiconductor firm Intersil of the USA.
For this reason, most underwater "telephones" either operate in "baseband" mode (at the same frequency as the voice and is basically a loudspeaker), in a "UQC-1" mode (as defined in MIL-C-15240D) with a modulated carrier of 7,500 Hz, or in "UQC-2" mode (as defined in MIL-C-22509) from around 8,500 hertz to approximately 12,000 hertz, or in the ...
Audio power is the electrical power transferred from an audio amplifier to a loudspeaker, measured in watts.The electrical power delivered to the loudspeaker, together with its efficiency, determines the sound power generated (with the rest of the electrical power being converted to heat).
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