It's not a question of pressure; a wave has whatever pressure it has. It's a question of frequency (wavelength). Just like a flute can't make tuba sounds, a small one of these can't attenuate large wavelengths. But they make larger flutes that can play lower tones. Could you not just make one of these arbitrarily large to handle an arbitrarily low frequency?
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It's not a question of pressure; a wave has whatever pressure it has. It's a question of frequency (wavelength). Just like a flute can't make tuba sounds, a small one of these can't attenuate large wavelengths. But they make larger flutes that can play lower tones. Could you not just make one of these arbitrarily large to handle an arbitrarily low frequency?