Sound Amplification System_rajhigh

SOUND AMPLIFICATION SYSTEM WHAT IS SOUND Sound, that stimulates the sense of hearing. In humans, hearing takes place whenever vibrations of frequencies from 15 hertz to about 20,000 hertz reach the inner ear. WAVE MOTION Wave Motion, in physics is a mechanism by which energy is conveyed from one place to another TYPES OF WAVES WAVES ARE OF TWO TYPES • LONGITUDENAL WAVES:eg. SOUND WAVES

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TRANSEVERSE WAVES:eg. RIPPLES PRODUCED IN A ROPE

A SOUND AMPLIFICATION SYSTEM IS COMPOSED OF ………… 1. MICROPHONE 2. AMPLIFIER 3. LOUDSPEAKER

MICROPHONE Microphone is a device that is used to transform sound energy into electrical energy . The American Alexander Graham Bell invent the microphone . AMPLIFICATION The electronic energy coming from a playback unit must be brought up to an adequate level before it can be heard. The output of the preamplifier is fed to the input of a powerful amplifier. This device takes the electronic energy from the preamplifier and increases the voltage or power of the energy, so the amplifier can deliver enough power at its output to drive loudspeakers. LOUDSPEAKER Loudspeaker, device that converts an electrical signal into sound.

RAJESH KUMAR BALJEET SINGH BAKSHISH SINGH SATNAM SINGH 10th B, C Govt.High School, Rajpura Town