Sound Notes

Waves

A disturbance of wiggle/vibration in some period of time.

Waves cannot exist in a single space, but must move from one place to the other. In other words, parts of a wave move in space from one place to another.

The pendulum is an example

Types

Transverse Wave

A wave where the vibrations is at a right angle to the motion of the wave.

Longitudinal Wave

Wavelength

The distance between two wave crests or two wave troughs

Amplitude

The distance from the crest to the baseline

Cycle

One trough and one peak

A wave where the vibrations is in the same direction as the motion of the wave.

Light waves, Ocean waves,

Sound waves

The type of wave can change based on what medium it passes through

In longitude waves, the amplitude is the maximum distance the sound wave particles need to travel from the undisturbed distance.

Frequency

The number of wave crests that pass a point , how fast a wave Travles (Hertz)

Hertz

The numbed of wave cycles per second

1 Hz = 1 wave per second

Detected by humans as pitch

Instrument parts

Guitar

Bridge

Holds the stings and connects the energy into the sound board.

Frets

Raised metal rods that are used to change the length of the strings.

Natural Frequency

Everything has its natural frequency

The frequencies that an object has that is determined by the material, density, and mass.

Vibration is an acceleration