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A microphone, colloquially called a mic or mike (), is a device a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, radio and television broadcasting. They are also used in computers for recording voice, speech recognition, VoIP, and for non-acoustic purposes such as ultrasonic sensors or knock sensors. Several types of microphone are used today, which employ different methods to convert the air pressure variations of a sound wave to an electrical signal. The most common are the dynamic microphone, which uses a coil of wire suspended in a magnetic field, the condenser microphone, which uses the vibrating diaphragm as a capacitor plate, and the contact microphone, which uses a crystal of piezoelectric material. Microphones typically need to be connected to a preamplifier before the signal can be recorded or reproduced. In order to speak to larger groups of people, a need arose to increase the volume of the human voice. The earliest devices used to achieve this were acoustic megaphones. Some of the first examples, from fifth century BC Greece, were theater masks with horn-shaped mouth openings that acoustically amplified the voice of actors in amphitheaters. In 1665, the English physicist Robert Hooke was the first to experiment with a medium other than air with the invention of the 'lovers' telephone' made of stretched wire with a cup attached at each end. In 1861, German inventor Johann Philipp Reis built an early sound transmitter (the 'Reis telephone') that used a metallic strip attached to a vibrating membrane that would produce intermittent current.

This GIF Bitmap Image Microphone Free Photo is a part of Microphones Category in Office Folder. Microphone Free Photo has a Resolution of 86x121 Pixels. Microphone Free Photo is of .gif (Graphics Interchange Format) Format. It's Size is 8.3KB. This GIF has been Downloaded 95 times till now. Microphone Free Photo was Added on 16-09-2021. Download Microphone Free Photo by clicking the button below:

Image Name: Microphone Free Photo
Image Category: Office / Microphones
Date Added: 16-09-2021
Resolution: 86x121

Format: GIF
Downloads: 95
Views: 115
Size: 8.3KB

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