The amplitude of vibration of eardrum, at the threshold of hearing, is about
1/10 the diameter of a hydrogen atom.
The range of amplitudes over which a human hears, between threshold and pain, is about 106, or 120 dB.
Human listeners can discriminate sounds that are separated by no more than 1-2 dB
The range of frequencies over which a human hears is between 20 Hz and 20 kHz, or xx octaves.
Human listeners can discriminate sounds that are separated by no more than 1-2 Hz.
