Posts

Image
Type of microphone * moving coil microphone. * crystal microphone. * ribbon microphone. * carbon granule microphone. * elctret microphone. * wireless or cordless microphone. * telescopes or gun microphone. Ribbon microphone In this type of microphone carbon granules are packed in the casing and the resistance of carbon granules depend on applied pressure. when the sound wave strike on the diaphragm then the diaphragm vibrates as a result there is a compression or rarefaction in the carbon granules. when the carbon granules a compressed there resistance decreases, when the carbon granules loosen their resistance increase. this change in resistance of carbon granules changes the current in the circuit. this change in current causes a change in terminal voltage.    Characteristics of carbon granule * sensitivity is very high , about 20dB . * signal to noise ratio is poor. * distortion is high ,about 10%. * output impedance is ,about 100 Ohm,s. *...
Post a Comment
Read more

pdf for ppt in microphone short note.

Image
                                           MICROPHONE A microphone is a transducer which convert acoustical energy into electrical energy. In microphone amplitude of electrical signal are proportional to intensity of sound wave. working principle * When a user sound wave created by voice carry energy towards the microphone. * In side the microphone  the diaphragm moves back forth when the sound wave hit its. * The coil attached the diaphragm move back forth as well. * The permanent magnet attached to the coil produce in magnetic field that cuts through the coil as the coil moves back and forth and electric current flow through it. * The electric current flow out from the microphone to an amplifier or sound recording device. characteristics of microphone *Sensitivity sensitivity of microphone is its ability to pick up the weakest sound. This can be me...
Post a Comment
Read more