JVC QAN0067-003 Microphone
The JVC QAN0067-003 Microphone from JVC is a replacement microphone for the GY-LS300 camera and will work on most JVC ProHD, and 4KCAM camcorders. The mic is used to capture audio and is powered by 48V phantom power. A hardwired cable and XLR output connector is provided, and a foam windscreen is included.
A microphone, colloquially named mic or mike (/maɪk/),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, and 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 in use, 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 piezoelectric 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 amphitheatres 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. Better results were achieved in 1876 with the “liquid transmitter” design in early telephones from Alexander Graham Bell and Elisha Gray – the diaphragm was attached to a conductive rod in an acid solution.[4] These systems, however, gave a very poor sound quality.
David Edward Hughes invented a carbon microphone in the 1870s.
The first microphone that enabled proper voice telephony was the (loose-contact) carbon microphone. This was independently developed by David Edward Hughes in England and Emile Berliner and Thomas Edison in the US. Although Edison was awarded the first patent (after a long legal dispute) in mid-1877, Hughes had demonstrated his working device in front of many witnesses some years earlier, and most historians credit him with its invention.The carbon microphone is the direct prototype of today’s microphones and was critical in the development of telephony, broadcasting and the recording industries.[9] Thomas Edison refined the carbon microphone into his carbon-button transmitter of 1886.This microphone was employed at the first ever radio broadcast, a performance at the New York Metropolitan Opera House