Waveforms Flashcards
speed of sound
344 metres per second.
what increase speed of sound travel?
density and temperature
Sound can be defined as
a wave like mechanical disturbance of
an elastic medium
what do sine waves allow us to do?
hey allow us to model the physical behaviour of
the oscillations that manifest in physical entities
hey allow us to model the physical behaviour of
the oscillations that manifest in physical entities
amplitude, frequency, and phase.
Amplitude
apparent strength of a sound wave
peak amplitude (Apk)
the maximum instantaneous magnitude from the zero point that a waveform takes.
peak-to-peak amplitude (App)
the instantaneous magnitude between the positive peak excursion, and negative peak excursion of the waveform.
root mean square (RMS or ARMS)
average energy content of the waveform; if the waveform is squared, averaged over a designated time period, the square root of this averaged value will be the
RMS value
wavelength
the distance a periodic wave travels before it starts to repeat itself
when is a waveform considered periodic?
when the waveform is repeated at a constant rate
frequency
rate at which a period repeats itself
Phase
specifies the location or timing of a point within a
wave cycle of a repetitive waveform
in phase definition
Two sound waves of the same frequency that are perfectly aligned; have a phase difference of 0
constructive interference
Two waves that are in phase add to produce a sound wave with an amplitude equal to the sum of
the amplitudes of the two waves
