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Waves and Sound
Terms in this set (38)
the maximum movement up or down from the rest position. Indicates the amount of energy carried by the wave. How we hear loudness.
a space in a wave where there are lots of particles and high air pressure.
when waves combine in such a way that the amplitude of the resulting wave is greater than either of the original waves - occurs when waves meet crest to crest or trough to trough.
highest point of the wave; it is the maximum upward displacement of the particles in a medium.
when waves combine crest to trough and cancel the wave out or result in a smaller wave
the bending of waves around a barrier or through an opening.
the apparent change in the frequency of a sound caused by the motion of either the listener or the source of the sound.
the organ of the body that detects sound.
how easily particles return to their original positions after they have been disturbed.
waves that do not need a medium to be transmitted; these waves can be transmitted through a vacuum and can exist with or with out a medium.
The number of complete waves or cycles per unit of time. Every complete wave has one trough and one crest.
describes sounds with frequencies lower than 20 Hz.
the amount of energy carried by a wave; indicated by the amplitude of the wave.
when two or more waves arrive at the same place at the same time.
the motion of the medium is parallel to the direction of the wave; a wave that consists of a series of compressions and rarefactions.
wave that requires a medium in order to be transmitted.
the matter or substance through which a wave is transmitted - includes all phases of matter.
having a pleasing quality (timbre), a definite identifiable pitch, and a repeated timing called rhythm.
any undesired sound, especially nonmusical sound, that includes a random mix of pitches.
how high or low a sound is perceived to be; how we hear frequency
a space in a wave where there are fewer particles.
the bouncing back of wave after it strikes a boundary that does not absorb the waves energy.
When one object vibrating at the same natural frequency of a second object forces that second object into vibrational motion...or when 2 interconnected objects share the same vibrational frequency; producing a standing wave with a large amplitude
energy produced by an object's vibrations.
A wave, when reflected from itself, causes a vibration of a system in which particular points are fixed (the nodes) while others between them vibrate with the maximum amplitude.
speeds faster than the speed of sound.
a wave in which the motion of the medium is at right angles to the direction of the wave. Wave moves up and down, while the medium moves left to right.
lowest point of a wave. It is the maximum downward displacement of the particles in a medium.
sounds with frequencies higher than 20,000 Hz.
any movement that follows the same path repeatedly.
disturbance that transfers energy through matter or space. A traveling disturbance that carries energy from one place to another.
the distance between two consecutive crests or troughs of a wave. It is measured in meters and represented by the Greek symbol lambda.
the tone quality of sound
When two sound waves of slightly different frequency approach your ear, the alternating constructive and destructive interference causes the sound to be alternatively soft and loud
locations along a medium where constructive interference continually occurs
locations along a medium where destructive interference continually occurs
speed of sound
velocity = (wavelength)(frequency)
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