Sound Amplification Khasa Bazar Amritsar

AMPLIFICATION  Amplification is the process of increasing

the amplitude, or power, of an electric signal. It is used to amplify the weak electric current drawn from the antenna of a radio-receiving set, the weak output of a photoelectric cell , the diminished current in a long-distance telephone circuit, the electrical signal representing sound in a public address system, and for many other purposes.

SOUND AMPLIFICATION Sound amplification is the process for increasing the amplitude, or power, of an electric signal representing sound.

TRANSISTOR

The voltage from a source is applied to the base of the transistor (labeled P). Small changes in this applied voltage across R1 (input) result in large changes in the voltage across the resistor labeled R2 (output). One possible application of this circuit would be to amplify sounds. In this case the input would be a microphone and the resistor R2 would be a speaker.

SOUND REPRODUCTION Modern sound systems include a wide variety of options, including compactdisc (CD) players, clocks, AM/FM radios, traditional record turntables, tape decks, three-way speakers, digital display, and an assortment of adjusters and equalizers to regulate the sound to personal taste.

VARIOUS TYPES OF SOUND SYSTEM  The CD player uses a laser to retrieve

the digital information from a CD and then converts the data into an electrical signal.  Digital audio tape (DAT) players for home use digitally play and record audio signals on tape.

PRESENTED BY: KARANJIT SINGH  GURINDER SINGH

FROM 9TH CLASS