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Pipes, tapered pipes and Helmholtz resonators [message #21310 is a reply to message #21298] |
Thu, 22 September 2005 12:55 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
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Wayne Parham
Messages: 18756 Registered: January 2001
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Illuminati (33rd Degree) |
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We've had some discussions here about bass-reflex, tuned pipes, tapered pipes and horns, specifically about their similarities and differences. So I've taken a moment to put together a list of references from authors other than those that normally contribute here.- Acoustics and Vibration Animations, list of articles and demonstration by Dr. Daniel Russell
- Acoustic High-Pass, Low-Pass, and Band-Stop Filters, Daniel Russell discusses propogation of sound through ducts, transmission lines and acoustic filter chambers
- Superposition of Waves, shows the interaction of standing waves
- Radiation from a Baffled Piston, shows the effects of frequency on directivity
- Evanescent Modes in Waveguides, shows higher order modes in ducts driven above and below their cutoff frequency
- Mass-Spring Systems with Damping, shows how system damping affects resonance amplitude, which in turn affects response
- The Forced Harmonic Oscillator, shows systems driven below resonance, at resonance and above resonance
- Coupled Oscillators, shows two mass-spring systems, like the mechanical resonance of a loudspeaker and the acoustic resonance of the cabinet
- The Dynamic Vibration Absorber, shows how two tunes systems can be optimized for working together. Think speaker and box.
- Vibrational Modes of a Circular Membrane, shows cone flex breakup modes
- HyperPhysics - Resonance, several links on the subject
- HyperPhysics - Air Column Resonance, online calculator of open pipe, closed pipe and tapered pipe resonant modes
- HyperPhysics - Cavity Resonant Frequency, online calculator of Helmholtz resonant frequency
- Resonance, standing waves, & Eigentones, discussion of resonance and Q
- Air Column Acoustics, a description of wave propogation in pipes and conical sections
- Musical Acoustics - Some Introductory Pages, several links about matters acoustic from the University of New South Wales
- Pipes and Harmonics, University of New South Wales, compares closed cylinder pipes, open cylinder pipes and closed conical pipes
- Helmholtz Resonance, University of New South Wales, describes Helmholtz resonance
- Sound Waves and Music, several online lessons from the Physics Classrom
- Resonance and Standing Waves, Physics Classroom
- Standing Waves and Resonance, describes standing waves in mechanical, electrical and acoustic transmission lines
- Resonata, a groovy applet
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