One does not have to be the distance of the wavelength to hear the frequency. That's a myth. Sound is a wave function of pressurization and depressurization in time and magnitude and that can be heard over very short distances, which is why headphones work.
Annoying sounds from cars at stop light
What causes the stereo in the car next to you at the stop light so loud and annoying with over the top bass and how can the driver stand it?