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Funny you mention animals. I often wonder if home environments have become screaming dens of high-frequency noise for dogs and cats. I know that flourescents te
by 0xff00ffee 7y ago
Funny you mention animals. I often wonder if home environments have become screaming dens of high-frequency noise for dogs and cats. I know that flourescents tend to osciallate around 40kHz, and I definitely have an LED bulb that whines for some reason. Not to mention cheap laptop power supplies that also whine over time.
Are all these cheap SMPS driving our pets insane? (or just annoying them? or neither?)
I wonder if I could rent some super-high-quality mic from a local sound reinforcement studio and look at a 20-60kHz FFT ... or do fancy mics not really go beyond human hearing?
- dspig 7y agoHigh quality recording mics and even mics designed for acoustic measurements usually (and deliberately) only go up to 20-40 kHz though roll off more gently than human hearing. Usually there is a mechanical resonance that's tuned to get a flat frequency response up to a point rather than a wider but rolling off response. A few specialist mics get up to 100 kHz, or some sort of laser vibration measurement...