The Principle of Linear Superposition and Interference Phenomena

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The Principle of Linear Superposition and
Interference Phenomena
CHAPTER 17
Interference Constructive and Destructive
Interference BEATS Standing Waves Transverse-St
ringed Instruments and Longitudinal-Wind
Instruments. Diffraction Speakers

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Beats with tuning forks
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Simulation of Beats
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lege/cutnell/0471151831/concepts/index.htm
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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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17.4 Beats
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17.4 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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17.5 Transverse Standing Waves
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17.5 Transverse Standing Waves
A standing wave is an interference effect that
can occur when two waves overlap.
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17.5 Transverse Standing Waves
A standing wave is an interference effect that
can occur when two waves overlap. Standing
waves can arise with transverse waves, such as
those on a guitar string, and also with
longitudinal sound waves, such as those in a
flute.
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17.5 Transverse Standing Waves
A standing wave is an interference effect that
can occur when two waves overlap. Standing
waves can arise with transverse waves, such as
those on a guitar string, and also with
longitudinal sound waves, such as those in a
flute. In any case, the principle of linear
superposition provides an explanation of the
effect, just as it does for diffraction and
beats.
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Simulation of Standing waves
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lege/cutnell/0471151831/concepts/index.htm
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Standing wave patterns
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Problem-25
The G string on a guitar has a fundamental
frequency of 196 Hz and a length of 0.62 m. This
string is pressed against the proper fret to
produce the note C, whose fundamental frequency
is 262 Hz. What is the distance L between the
fret and the end of the string at the bridge of
the guitar (see Figure 17.20b)?