Humans can reportedly hear sounds as low as 31 Hz. If we consider the speed of sound in air to be 1125 feet per second, then a sound at 31 Hz will have a wavelength of about 36 feet.
Normally, to capture a sound or other wave, we need an antenna that is at least as long as the wavelength of the signal we are attempting to receive.
But with the ear this is plainly not possible. If the cochlea of a human ear were to be unrolled, it would have a length of about 1 inch. Thus, in the sense of being an "antenna" it would seem to be far too short to be able to receive a 31 Hz signal, yet somehow it does.
How does the ear sense such low frequency sounds?