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Ideas

TheLink (130905) writes | more than 5 years ago

User Journal 1
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Active Digital Speaker (1)

TheLink (130905) | more than 5 years ago | (#25396885)

Active Digital Speaker:

Digital value gets sent to the speaker.
The position of the speaker diaphragm is read out to obtain a digital representation of the actual position.
(this can be done using optics and hamming code, or some other means - e.g. interference patterns)
The speaker compares the desired position with the actual position and moves the speaker cone/diaphragm till it reaches the desired position.

Contrast with analog speakers - you send a voltage+current and the cone moves hopefully in the right ways - there is no feedback at this point - the feedback loop is at the amp.
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