5 ms·
actually, for 20 kHZ, the frequency in his article, the OSHA recommendation is 105dB. And if you dig into the OSHA regs, the 115+30 standard for higher frequenc
by cowsandmilk 12y ago
actually, for 20 kHZ, the frequency in his article, the OSHA recommendation is 105dB. And if you dig into the OSHA regs, the 115+30 standard for higher frequencies only applies for 15 minutes of exposure per day or less. So, if you only want your charger running for 15 minutes, have at it!
- mikeyouse 12y agoAgain, why 20 kHz? The patent application only lists examples of greater than 40kHz -- most are in the range of 50+ kHz. My point isn't that this tech is going to work and change the world just that it's incredibly easy to be pessimistic and to justify it with small incorrect assumptions.
- jschwartzi 12y agoAlso, sound levels below OSHA limits can still be uncomfortably loud. They just won't do any permanent damage.