at least where can i find an answer to it. I've already tried wikipedia and got nothing abut it.
2007-02-26 05:49:10 · 4 answers · asked by helena_m_p 2 in Science & Mathematics ➔ Physics
R.P.M. means revolutions per minute. Thus the speed at which the turntable is revolving the record . This speed was a standard acceptable speed that the record industry used ,much like Cd's is the acceptable recording and listening device of today.
Today we have Mp3's which do not play in cd players,much like 78 rpm's will not play on a 33 1/3 speed.
78 rpm's moved at a faster motion,but it was discovered that 33 1/3 rpm's could contain "more music" by lowering the speed at which the turntable moved .
Hope this helps.
2007-02-26 06:00:24 · answer #1 · answered by Dfirefox 6 · 1⤊ 0⤋
Older records were designed on play at 45 rpm, and even older records at 78 rpm.
The playing speed of a record is a function of the record pressing technology available at the time, and the ability to "compress data", if you will, into a vinyl disk. As technology improved, more music "data" could fit onto the disk, and the record wouldn't have to rotate as fast to play it back without distortion.
Why those particular numbers were chosen must have been an industry-wide standard at the relevant times.
2007-02-26 06:03:17 · answer #2 · answered by wheresdean 4 · 2⤊ 0⤋
That was the standard that the industry decided on when they came out with them. With the technology of the time, they could get around 10 or 12 standard length songs on one record.
2007-02-26 05:55:01 · answer #3 · answered by Gene 7 · 0⤊ 0⤋
The obvious answer is that that is speed they are designed to be played at. Does that answer the question though?
2007-02-26 05:53:43 · answer #4 · answered by Anonymous · 0⤊ 0⤋