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mathew baynton – an overview to audio electronics كلمات اغاني

audio electronics are basically the implementation of electronic circuit designs for converting sound wave signals or pressure wave signals into electrical signals and vice versa. also, another method for creating audio signals is synthetically by generating electrical signals from electronic devices

the main components of audio electronics are; sound, microphones, speakers, and amplifiers

sound

sound can be defined as a type of energy, which vibrates through any medium like air or water. the vibrating range has a specific range of frequencies, which humans interpret as a; sound. sound is made up of 3 elements;

frequency_ speed of vibrations

the unit of frequency of sound is hertz(hz), which is defined as cycles per second

the human ear can detect sound frequencies from 20 to 20000 hz. but, frequencies ranging from 2000 to 5000 hz are more sensitive to the human ear

intensity_ how loud a sound can be?

the intensity of a sound can be defined as the amount of energy associated with the sound. the unit for measuring sound intensity is the decibel( db)

timbre_ quality of sound

timbre can be defined as the complex wave patterns that are seen when overtones are present along with the fundamental frequency

microphones

the microphone is a component that has the property to convert changes in sound pressure to changes in electric current

there are 3 types of microphones_

dynamic

condenser

electret

the dynamic microphones

these types of microphones consist of a plastic diaphragm, a voice coil, and a permanent magnet. these microphones are known for being rugged and to operate at a wide range of temperatures, also for providing smooth and extended frequency response

the condenser microphones

the condenser microphones work by using a pair of charged plates that are brought closer together or can be forced apart by changes in air pressure. they are known for providing crisp, low noise sound and can produce high_quality sound recordings

the electret microphones

these types of microphones provide high impedance and make sure that the charge on the electret element remains fixed. older electret microphones deliver poor performance, but modern microphones compete with condenser microphones

speakers

speakers function the opposite of microphones. they convert electrical signals into audible sounds. every speaker has some resistance or an impedance; that represents the average resistance between the speaker and the lead

there are various frequency ranges of speakers, according to which they are classified as_

woofers_ for low range frequencies ( less than 200 hz)

mid_range_ for frequencies ranging from 500 to 3000 hz

tweeter_ for frequencies more than those from midrange speakers

full_range speakers_ for frequencies ranging from 100 to 15000 hz

amplifiers

an audio amplifier can be defined as an electronic amplifier that has the property of amplifying low power electronic audio signals to a level that is high enough for loudspeakers

amplifiers are of 3 types_

preamplifier_ it amplifies the very weak signal from a microphone into signals which are strong to manipulate

low power amplifier_ they can manipulate signals which includes volume, and frequency equalization

power amplifier_ it is used to increase the power signal to drive high load speakers

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- mathew baynton

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