sound vocab quiz
sound
a longitudinal wave caused by a vibration (that travels at around 343 m/s)
loudness
the amplitude
decibels
a dimensionless unit that describes the ratio of two intensities of sound
resonance
the phenomenon that occurs when the frequency of a force applied to a system matches the natural frequency of vibration of a system
Doppler effect
an observed change in freq when there is relative motion between the source of sound and a listener
Intensity
the rate of energy flow through a given area
Harmonics
positive integer multiple of the fundamental frequency of a periodic wave;
Harmonic frequencies
the frequencies of these standing waves are integer multiples of the fundamental frequency F1
Harmonic wavelengths
the wavelengths of these standing waves are integer multiples of the fundamental wavelength
harmonic series
infinite series of positive fractions and numbers
beats
sound waves of slightly different freq produce beats; differences between frequencies=number of beats per second