Patent
Particulate flow detection microphone
David M. Schwartz
- 31 May 2005
17
TL;DR: In this article, sound-induced localized pressure changes in the gas are measured by detecting variations in gas opacity with an optical transducer disposed transverse to the flow direction, where the optical transducers are used to measure the gas opacity.
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Abstract: Gas containing particles or droplets flowing continuously through a microphone is perturbed by sound waves. Sound-induced localized pressure changes in the gas are measured by detecting variations in gas opacity with an optical transducer disposed transverse to the flow direction.
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Citations
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TL;DR: In this article, a system and method for processing and detecting nucleic acids from a set of biological samples, comprising: a capture plate and capture plate module configured to facilitate binding of nucleic acid within the set of Biological samples to magnetic beads; a molecular diagnostic module, comprising a cartridge receiving module, a heating/cooling subsystem and a magnet configured to enable isolation of nuclei acids, and a valve actuation subsystem configured to control fluid flow through a microfluidic cartridge for processing nucleic amino acid.
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TL;DR: In this article, a multilayered diaphragm 6 is disposed on an upper surface of the microphone holder with an air space 16 formed between the multilayer diaphrasm 6 and microphone holder 5.
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References
Patent
Microphone having linear optical transducers
TL;DR: In this paper, the use of linear optical transducers in several configurations to detect the motion of one or more conventional microphone diaphragms in proportional response to incident acoustic signals is described.
157
Transducer for sensing body sounds
TL;DR: In this paper, an acoustic-to-electrical transducer for sensing body sounds is described, which comprises a capacitive sensor, whereby a stethoscope diaphragm forms one plate of a capacitor, with the second plate of the capacitor being co-planar to the diaphrasm.
140
Patent
Method and apparatus for particle analysis
Reagan Cole
- 05 Oct 1992
TL;DR: An aerosol spectrometer combines the features of forced motion instruments and optical particle sizers to obtain density, diameter, electrical charge, magnetic moment and other physical attributes of individual particles as discussed by the authors.
52
Optical microphone with vibrating optical element
TL;DR: An optical microphone includes a vibrating membrane defining a diaphragm for receiving acoustic signals and an optical element such as a lens is attached for vibrating with the membrane in direct relationship with the acoustic input signals as mentioned in this paper.
39
Patent
Electro-optical system and method and apparatus for providing automatically-compensating, traceable calibration and zeroing for light scattering devices
Frederick M. Shofner,Arthur C. Miller,Gerhard Kreikebaum +2 more
- 02 May 1980
TL;DR: In this article, a calibration/zero control is combined with an electro-optical measurement instrument in a time-multiplex fashion to provide a self-diagnostic in situ measurement system and automatic compensation of the entire electrooptical train without interruption of the measurement process.
38
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