Ads
related to: characteristics of a microphone system in c major
Search results
Results from the WOW.Com Content Network
An electret microphone is a microphone whose diaphragm forms a capacitor (historically-termed a condenser) that incorporates an electret. The electret's permanent electric dipole provides a constant charge Q on the capacitor.
The condenser microphone, invented at Western Electric in 1916 by E. C. Wente, [22] is also called a capacitor microphone or electrostatic microphone—capacitors were historically called condensers. The diaphragm acts as one plate of a capacitor, and audio vibrations produce changes in the distance between the plates.
The carbon microphone, by virtue of using a power supply, gives a power gain. This can readily be demonstrated by connecting a battery, microphone and earphone in series. If the microphone and earphone are brought in contact the system will oscillate. This is only possible if the power gain around the loop is greater than unity.
A system sufficiently susceptible to microphonics could experience audio feedback, and make noises if jarred or bumped. To minimize these effects, some vacuum tubes were made with thicker internal insulating plates and more supports, [ 4 ] and tube-socket assemblies were sometimes shock-mounted by means of small rubber grommets placed in the ...
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 ...
RCA Type 44-BX ribbon microphone from 1940 used by CBS. Dr. Harry F. Olson began working for RCA Laboratories, where he developed ribbon microphones, first with field coils and then with permanent magnets, resulting in the first ribbon microphones with bi-directional pickup pattern, the RCA Photophone PB-17 and PB-31, introduced in 1931.
The microphone consisted of four amplifiers, for different powering schemes, and about 20 capsules, for different directional patterns and/or frequency response characteristics (any capsule of the series is compatible with any of the amplifiers). This was the first type of microphone to let the user separate the capsule from the amplifier (body ...
The compact design of the MD421 transducer system was novel at the time, because directional pickup patterns had only been achieved by adding sound entry ports to the rear of the element (for instance, the Electro-Voice "variable-D system" with a row of ports in the handle.) Microphones with sound-shaping ports could only be held in the hand to ...
Ads
related to: characteristics of a microphone system in c major