2007-10-05 03:33:55 · 3 answers · asked by Anonymous in Entertainment & Music ➔ Music ➔ Jazz
The basics haven't changed. Speakers are still made of paper cones attached to a coil of wire, surrounding a magnet.
Oh, there have been improvements over the past 80+ years -- studies of acoustics have allowed us to improve the frequency response. New materials have given us more powerful magnets to increase efficiency and dynamic range of speakers. Some applications (i.e. sub woofers) use different materials in place of the paper cones but, the basics are the same.
The same thing applies to headphones. they are still diaphrams attached to coils of wire wrapped around magnets. New materials allow us to produce ultra thin, ultra light diaphrams (versus metal ones from the '20s), but the basic physics is still the same.
There have been some attempts at new technologies, but none of them have been put into widespread use. The good old paper cone permanent magnet speaker is still the 'king'.
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2007-10-05 09:39:12 · answer #1 · answered by tlbs101 7 · 0⤊ 0⤋
You need to consider the recording technologies also. The recording technologies have improved many, many times.
2007-10-05 10:29:31 · answer #2 · answered by Teaim 6 · 0⤊ 0⤋
they haven't changes at all... we all still have two ears.
2007-10-05 03:43:01 · answer #3 · answered by IG64 5 · 0⤊ 0⤋