This article describes a product that was introduced 30 years ago called EARWAX. EARWAX was a cream that was supposed to improve your hearing when applied to the openings to your ear canals. The author proposes that EARWAX did not work and then goes on to describe the reasons why people would either believe that EARWAX did work or automatically dismiss the product.
Read the full article here:
A scientific analysis of ear wax. Kinda cool.
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I’m seeking info for sanctuary reverberation absorbsion material ( panels) and best placement.
There may be apps that do that. You can definitely find spectrum analyzers that will measure ultra low.
Is there an APP that can measure the ultra low frequency levels?