General Question

Trance24's avatar

How can sound be recorded onto the grooves in a vinal record?

Asked by Trance24 (3311points) January 5th, 2008

Well I was watching how it’s made on discovery. And they were making vinal(sp?) records, and showing how when it records it creates grooves, with the sound. But what I dont understand is how this sound is in the grooves how is this possible?

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4 Answers

bluemukaki's avatar

The needle vibrates across the grooves, generating sound waves which are amplified.

sndfreQ's avatar

the ‘grooves’ are actually one single groove, whereby sound that starts as sound in the air (acoustic energy) is changed into electrical energy (a process called transduction).

The electrical current flows down the wires of the disc cutter, then the electrical energy is transduced once more into mechanical energy in the form of a groove.

When viewed under a microscope the groove in a vinyl record actually resembles a ‘wavy’ line, which represents the vibration that was the original sound vibration. The groove is ‘storing’ the original energy of the sound, which when read by the stylus (needle) of a phonograph, translates the energy back to electrical and eventually acoustic energy.

Spargett's avatar

Its “vinyl” for the record.

Trance24's avatar

@sndfrig Thank you, that answers my question quite well. =]

@Spargett Thanks for the spelling correction. =]

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