Pitch Psychological impression of the height of a sound, closely related to frequency. Propagation Refers to the process of wave movement and its characteristics in any medium. Few bits result in a distorted representation of the original signal and introduce noise. Every system has a natural vibrating frequency. When an external vibration acts on such a system with the same phase and similar frequency, the amplitudes add.
Resonance is a kind of 'mechanical amplifier' and is used in many musical instruments.
For example, the acoustic guitar has a resonator that is the body of the instrument. Signal A signal representing the most simple type of vibration called simple harmonic motion . It has the shape of a sine. It is represented by a sine signal. Each complex signal can be analyzed into a sum of sine signals.