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Boring in closing reply!!

A perplexing problem:

How to determine if instantenous inaudible high SPL sound in our hearing range does hearing damage? Just because it's "inaudible" does not exclude it from doing so. Continuous high SPL infrasonic and ultrasonic does do damage and we can't hear it.
Impulse damage can occur from less than 1 second loud sounds like gunshots and firecrackers. And indeed 150dB impulse sound causes immediate damage. So the critical factor is time the duration. High SPL instantenous sounds are heard but not perceived as loud. Suggesting that our ear mechanism being mostly mechanical in nature it's not passing instantenous pressure waves efficiently. Any experimental study of this would be difficult. But pulses of sounds of varying duration say 110 dB could be provided and then checking for the following: Tympanic membrane movement. Electromyographic conduction of the stapedius muscle? Electroencephalogram to detect arrival of signal as nerve activity in the receiving temporal lobe of the brain. Volunteer reply as to how loud it felt also recorded. Of course audiogram testing of subjects prior to testing to assure normal hearing would be required. Analysing the data would give an idea as to how varying time pulses affects our hearing. Perhaps alleviating the worry of the original question. Can hi SPL instantenous pulses do damage?

Any volunteers?






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