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 a vibration occurs. It also specifies how many complete vibrations occur at a given time (usually one second). 1 1F = 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 1T = or F Frequency
WAVE SPEED - is the rate at which the wave travels through a particular point. Wave speed = Frequency x Wave length or wavelengthWave 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 = fwhere v is called the phase speed (magnitude of the phase velocity) of the wave and f is the waves frequency.
LOUDNESS - physiological sensation that varies from one person to another. It depends on the sense of hearing. INTENSITY (I) - depends on the amplitude of pressure variations within the sound waves. The unit used for sound intensity level (B) is decibel (dB) , named after Alexander Graham Bell. QUALITY – enables to identify the source of sound because tones differ from one another. PITCH – refers to the highness or lowness of a tone. It is related to frequency.
REFLECTION OF WAVEa.) 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. ReyesIV-1