Max Townshend uses story to convince people that frequencies far too high to hear, still make a difference to sound fidelity. Here he talks about high frequencies that go through the eyes, and cites ultrasonic welding tools causing factory workers to go deaf. The surprising elements in the story make it a credible and compelling piece of argument.

Max Townshend uses story to convince people that frequencies far too high to hear, still make a difference to sound fidelity. Here he talks about high frequencies that go through the eyes, and cites ultrasonic welding tools causing factory workers to go deaf. The surprising elements in the story make it a credible and compelling piece of argument.