Acoustics, Ultrasound and Vibration
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- Prediction of Earthquakes
- Paper by H.L.Dunegan on the use of high frequency sensors to detect acoustic emissions in order to predict earthquakes.
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- PureSpeakers
- Discussions of loudspeaker plans and designs. Sealed, isobaric, ported, mtm, speaker, esotar, tweeter, woofer, midrange, speaker building
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- Scientific Applications and Research Associated, Inc
- SARA specializes in harnessing electromagnetism, plasmas, acoustics and electronics to build practical applications for force protection, renewable energy, UAVs, small robotics and special test challenges.
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- Wave Field Synthesis and Holophony
- Provides information with animations on a wave field synthesis based holophony approach to reproducing the acoustics of the opera house in the living room.
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- AcouSTO (Acoustics Simulation Tool)
- Open source boundary element method solver for the Kirchhoff-Helmholtz Integral Equation. Plan wave scattered by a unit sphere.
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- Sonic Beacon
- Sound card based loudspeaker test and analysis program for Windows. It will perform frequency and phase response, harmonic and intermodulation distortion, impedance, sensitivity and SPL tests.
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- Acoustic Holography
- An introduction with articles on acoustic imagery, nearfield methods, applications and suppliers.
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- Acoustic Holography
- Information from Wikipedia on this means of estimating the sound field near a source by measuring acoustic parameters away from the source via an array of pressure or particle velocity transducers.
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- Acousto-Optical Effect: Deflectors
- Optical deflectors are intended for the spatial control of optical beams.
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- Acousto-Optical Filters
- The principle of operation of these filters is based on the dependence of the diffracted light wavelength on the acoustic frequency. This article considers non-collinear filters based on a single TeO2 crystal.
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- Acousto-Optics
- Article from Wikipedia on this branch of physics that studies the interactions between sound waves and light waves, especially the diffraction of laser light by ultrasound or sound in general.
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- New 3-D Acousto-Optic Instruments for Small Scale Oceanic Measurements
- Discussion paper by Jules Jaffe, Ed Reuss, Andrew Palowitch, Duncan McGehee and Girish Chandran. Includes diagrams and references.
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- Cool Sound Industries, Inc.
- Offers an environmentally safe method of air conditioning, heating and refrigeration powered by the use of thermoacoustic technology or soundwaves.