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Technical and scientific discussion of amps, cables and other topics.

Speaking of intense HF

While I was 18, I worked part time at an audio shop that used a piezo-electric transducer for the burglar alarm. At close, we'd all cluster near the door (had to be closed!) while Julian set the alarm. The resulting sound was a most irritating ultrasonic shriek that got me out the door rather quickly! It didn't seem to bother the older guys. :)

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  • Speaking of intense HF - E-Stat 09/1/0911:13:15 09/1/09 (0)

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