2.4 Addition of waves Simulation 17.1

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2.4 Addition of waves Simulation 17.1
Constructive and Destructive Interference of Two
Pulses, SIM 25
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Adding waves using the Superposition Principle
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Beats with tuning forks
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Simulation of BeatsSIM 26
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Beat Wave Pattern
A 10-Hz sound wave and a 12-Hz sound wave, when
added together, produce a wave with a beat
frequency of 2 Hz. The drawings show the pressure
patterns (in blue) of the individual waves and
the pressure pattern (in red) that results when
the two overlap.
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Beats
Musical instruments are tuned by listening to the
beat frequency. For instance, a piano tuner
listens to the beats produced between the string
and a source with the correct frequency. The
piano tuner adjusts the tension in the string
until the beats vanish, ensuring that the string
is vibrating at the correct frequency.
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2.6 The Doppler Effect
When the truck is stationary, the wavelength of
the sound is the same in front of and behind the
truck.
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2.6 The Doppler Effect
When the truck is stationary, the wavelength of
the sound is the same in front of and behind the
truck. When the truck is moving, the wavelength
in front of the truck becomes smaller, while the
wavelength behind the truck becomes
larger. Doppler effect is the change in
frequency or pitch of the sound detected by an
observer because the sound source and the
observer have different velocities with respect
to the medium of sound propagation.
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Application of Doppler EffectNexrad Next
Generation Weather Radar