Waves
A periodic back-and-forth motion that transmits energy.
What is a wave?
Vibrations traveling as longitudinal pressure waves.
What is sound?
When two or more sound waves meet, this is the reinforcement or cancellation that occurs.
What is interference?
A series of organized sound waves with deliberately-arranged specific pitches.
What is music?
The set of frequencies at which an object vibrates.
What are natural frequencies?
The substance that a wave transfers its energy through.
What is a medium?
Sound cannot travel through this.
What is a vacuum?
A sound that can be heard after a sound wave is reflected from an object.
What is an echo?
A random unorganized sound.
What is noise?
f=N/t
What is the frequency of a wave?
This is the low point of a wave.
What is the trough?
The study of sound waves.
What is acoustics?
This technique uses a sound's reflection to calculate distance.
What is echo ranging?
The difference in pitch between a note and a second one that has twice its frequency.
What is an octave?
v=331 m/s + (0.61m/s)(T/(1degree C))
What is the speed of sound?
A high point of a wave.
What is the crest?
The EFFECT of INTENSITY on the way our ears perceive sound.
What is loudness?
This is what happens when a compression pulse and a rarefaction pulse overlap.
What is destructive interference?
The most dominant sound of a musical note.
What is the fundamental?
v=lambdaf
What is the speed of a wave?
This type of wave has particles of the medium oscillating at right angles to the direction of wave travel.
What is a transverse wave?
The EFFECT of FREQUENCY on how we perceive sound.
What is pitch?
When two compression pulses or two rarefaction pulses pass through each other.
What is constructive interference?
The frequency relationships between a fundamental and its overtones.
What is a harmonic series?
Sound intensity is ________ proportional to the distance squared.
What is inversely?
What is the frequency?
This happens to the frequency of a sound as an object that's making the sound moves closer to you.
What is increase?
The spreading out of a wave after it passes through an opening.
What is diffraction?
The musical distance between two notes.
What is the interval?
T=1/f
What is the period of a wave?
The maximum distance particles are displaced in a wave.
What is the amplitude?
Sound that's too low of a frequency to be heard.
What is infrasonic?
The relationship between the angle of incidence and the angle of reflection is described by this.
What is the law of reflection?
When a driving frequency is the same as (or very close to) one of the object's natural frequencies.
What is resonance?
The speed of a wave is __________ proportional to frequency.
The part of a longitudinal wave where particles are spread out.
What is a rarefaction pulse?
The strength of a sound wave.
What is the intensity?
The energy of sound waves is dissipated in matter.
What is absorption?
The most consonant frequency.
What is 1:2?
This property is directly proportional to wave speed (as one increases, the other does too).
What is wavelength?
Waves that strike an obstacle?
What are incident waves?
Traveling faster than the speed of sound.
What is supersonic?
The bending of a wave's path as a result of a change in the wave's speed.
What is refraction?
When two notes interfere in harmony.
What is consonance?
Other sounds at a higher frequency than the fundamental.
What are overtones?
The perpendicular line from which reflection is measured.
What is normal?
The change in frequency due to an object's motion.
What is the doppler effect?
This is what happens to a wave when it passes between two media.
What is bending toward the medium that causes the speed to slow?
A musical instrument's distinctive sound quality.
What is its timbre?
Multiple reflections that are close enough together that we perceive them as a single sound.
What is reverberation?