Thursday, 19 June 2014 14:06
H2-33: SPEAKER AND EXPONENTIAL HORN
Additional Info
- ID Code: H2-33
- Purpose: Demonstrate the effect of an exponential horn enclosure.
- Description: A small loudspeaker is held up behind the opening of an exponential horn. The sound becomes much louder, especially in the bass. A horn enclosure has the effect of taking an extended source such as a loudspeaker and creating the best impedance match with the outside world, providing the most coherent plane wave. Compare this to H2-32, which uses the same speaker with a flat baffle. Invite students to speculate about what the effects the different shapes have.
- Availability: Available
- References: REFERENCES: (PIRA 3B25.35)
- Loc codes: H2, OS5
Published in
H2 Wave Properties of Sound
Tagged under
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H2-01: FOCUSING OF SOUND WITH CONCAVE REFLECTORS
Demonstrate how sound waves can be focused by concave reflectors. Read More
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H2-02: PARABOLIC MICROPHONE
Show what a parabolic microphone is and to demonstrate its sensitivity individually. Read More
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H2-03: ACOUSTIC RADAR
Illustrate how RADAR and SONAR work Read More
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H2-11: SOUND LENS
Demonstrate focusing of sound by refraction in a sound lens Read More
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H2-21 AUDIBLE YOUNG'S EXPERIMENT - GROUP LISTENING
Demonstrates interference of sound waves with two coherent sources
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H2-22: INTERFERENCE - TRANSPARENCIES
An optical analog to the interference pattern from two identical sound sources. Read More
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H2-24: AUDIBLE YOUNG'S EXPERIMENT - MIC AND SCOPE
Demonstrate interference of sound with two coherent sound sources in a quantitative way. Read More
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H2-25: QUINCKE'S INTERFERENCE TUBES
Demonstrate interference of sound waves in a perhaps surprising way. Read More
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H2-26: PHASE REVERSAL BETWEEN STEREO SPEAKERS - MUSIC
Demonstrate interference of sound in a dramatic way. Read More
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H2-27: PHASE REVERSAL BETWEEN STEREO SPEAKERS - OSCILLATOR
Dramatically demonstrate interference between two identical sources. Read More
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H2-28: FOURIER SYNTHESIZER - ADDITION OF WAVES
Demonstrate addition of two sine waves with variable phase difference. Read More
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H2-31: ACOUSTIC COLLIMATOR
Demonstrate the effect of frequency on diffraction of sound. Read More
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H2-32: SPEAKER WITH BAFFLE
Demonstrates diffraction and interference of sound waves
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H2-33: SPEAKER AND EXPONENTIAL HORN
Demonstrate the effect of an exponential horn enclosure. Read More
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H2-41 DOPPLER BALL
Demonstrates Doppler effect
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H2-42 DOPPLER EFFECT - TUNING FORK ON STRING
Demonstrates Doppler effect
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H2-51 BEATS - AUDIO OSCILLATORS, SPEAKER & OSCILLOSCOPE
Hear audio beats and see their wave forms on an oscilloscope
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H2-52: BEATS AND RESONANCE - TUNING BARS
Demonstrate beats, and to demonstrate resonance between two identical tuning bar resonators. Read More
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H2-53 BEATS - AUDIO OSCILLATORS AND SPEAKERS
Hear beats
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H2-54: BEATS - MOIRE PATTERN MODEL
Model for beats between mistuned audio oscillators. Read More
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H2-55: BEATS AND RESONANCE - TUNING BOXES
Illustrate beats and resonance. Read More
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