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2. TOA Corporation - Wikipedia

   en.wikipedia.org/wiki/TOA_Corporation

   TOA Corporation. TOA Corporation (TOA株式会社, Tī Ō Ē Kabushiki-gaisha) is a Japanese electronics company, specializing in public address systems, intercom systems, microphones, array speakers and megaphones. [ 3] The company's products are used in a variety of settings, among them Brompton Oratory, a large neo-classical Roman Catholic ...

3. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   A wireless microphone, or cordless microphone, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone , it has a small, battery-powered radio transmitter in the microphone body, which transmits the audio signal from the ...

4. Spark-gap transmitter - Wikipedia

   en.wikipedia.org/wiki/Spark-gap_transmitter

   The spark gap is inside the box with the transparent cover at top center. A spark-gap transmitter is an obsolete type of radio transmitter which generates radio waves by means of an electric spark. [ 1][ 2] Spark-gap transmitters were the first type of radio transmitter, and were the main type used during the wireless telegraphy or "spark" era ...

5. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   Battery-powered systems can be used by guides who are speaking to clients on walking tours. Public address systems consist of input sources (microphones, sound playback devices, etc.), amplifiers, control and monitoring equipment (e.g., LED indicator lights, VU meters, headphones), and loudspeakers.

6. List of microphone manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_microphone...

   Nady Systems, Inc. Georg Neumann GmbH; Nevaton; ... TOA Corp. Zoom Corporation ... The following is a list of defunct microphone manufacturers with articles. Aiwa ...

7. Shure - Wikipedia

   en.wikipedia.org/wiki/Shure

   Shure manufactures several lines of wireless microphone systems, many of them utilizing microphone capsules from their wired microphones models such as the SM58, SM87, Beta 58, and Beta87A. The systems range in scope from entry-level to high-end systems used for touring and large-scale event applications.