PARTS OF THE WAVE

CREST - the highest point of the wave.

TROUGH - the lowest point of the wave.

AMPLITUDE - is the displacement from the resting position to the highest (or lowest) point of the wave.

WAVELENGTH – is the distance from one point to the next identical point of the wave.

FREQUENCY – describes how often avibration occurs. It also specifies how manycomplete vibrations occur at a given time(usually one second).

1 1

F = or

T Period* The SI Unit of frequency is the HERTZ (Hz)

, equivalent to one cycle per second.

PERIOD – is the time needed to complete one vibration.

1 1

T = or

F Frequency

WAVE SPEED - is the rate at which the wave travels through a particular point.

Wave speed = Frequency x Wave length

or

wavelength

Wave speed =

period

WAVELENGTH – distance from crest to crest.

The wavelength λ of a sinusoidal waveform traveling at constant speed v is given by:

v

λ =

f

where v is called the phase speed (magnitude of the phase velocity) of the wave and f is the wave's frequency.

LOUDNESS - physiological sensation thatvaries from one person to another. Itdepends on the sense of hearing.

INTENSITY (I) - depends on the amplitudeof pressure variations within the soundwaves. The unit used for sound intensitylevel (B) is decibel (dB) , named afterAlexander Graham Bell.

QUALITY – enables to identify the sourceof sound because tones differ from oneanother.

PITCH – refers to the highness or lowness ofa tone. It is related to frequency.

REFLECTION OF

WAVE

a.) REFRACTED- when wave travel from

one medium to another.

b.) DIFFRACTED- when wave pass

through a narrow opening and interfere

when they interact with other wave.

TRANSVERSE WAVE

The vibrational direction of the particles in the medium is

up and down perpendicular to the direction of the wave.

LONGITUDINAL WAVE

The vibrational direction of the particles of the medium is

parallel to the direction of the wave.

Prepared by:

Katherine B. Pon-an Kristine Camille R. Robles Paul Nicko D. Ferrer Marjay G. Panganiban Joven M. Reyes

IV-1