Listening to music doesn't drive a constant 22 kHz tone.
[Edit] I really don't understand -- why was I downvoted here? Can someone explain why they think I'm wrong? Isn't a constant, high-frequency tone going to draw more power than variable output with significant larger gaps (and a likely lower peak voltage difference?)
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It doesn't drain the battery any more than listening to music does :) Really cool project!
Listening to music doesn't drive a constant 22 kHz tone.
[Edit] I really don't understand -- why was I downvoted here? Can someone explain why they think I'm wrong? Isn't a constant, high-frequency tone going to draw more power than variable output with significant larger gaps (and a likely lower peak voltage difference?)