PatentDOI
Loudspeaker system incorporating acoustic waveguide filters and method of construction
TLDR
In this article, a method of constructing an acoustic filter incorporating a technique in which the filter is modelled with one or more distributed two port elements is presented, where each distributed element is defined by a characteristic impedance and length and includes a waveguide filter which does not require damping.Abstract:
A method of constructing an acoustic filter incorporates a technique in which the filter is modelled with one or more distributed two port elements. The or each distributed element is defined by a characteristic impedance and length and includes a waveguide filter which does not require damping. The or each filter section is characterized in that it has at least two resonances which are used to shape a specified response for the filter. A substantially reactive acoustic filter constructed according to the method and a loudspeaker system incorporating such an acoustic filter are also disclosed.read more
Citations
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Patent
Multi-element directional acoustic arrays
TL;DR: In this paper, the correlated content from the left input channel and the right input channel signals is removed from the center input channel signal to provide a modified left channel signal, a modified right channel signal and a modified center channel signal.
Patent
Acoustically asymmetric bandpass loudspeaker with multiple acoustic filters
TL;DR: In this paper, a bandpass loudspeaker enclosure with three sub-chambers is presented, one being a non-Helmholtz-reflex chamber of a sealed acoustic suspension construction, and the remaining two chambers utilizing two passive acoustic radiators.
Patent
Waveguide electroacoustical transducing
TL;DR: In this article, an acoustic waveguide, an acoustic driver mounted in the waveguide so that a first surface radiates sound waves into a waveguide and an acoustic volume acoustically coupled to the acoustic Waveguide for increasing the amplitude of the sound waves radiated from the acousticWaveguide.
PatentDOI
Passive directional acoustic radiating
TL;DR: In this paper, an acoustic apparatus, including an acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the environment is described. But the authors do not consider the effect of the driver's position on the volume velocity of the pipe.
PatentDOI
Low-profile speaker arrangements for compact electronic devices
Ruchi Goel,Stephen R. McClure +1 more
TL;DR: In this paper, a portable electronic device that provides audio sound output from multiple internal speakers to a common output audio opening in a housing of the portable electronic devices is disclosed. And the sound (i.e., pressure waves) produced by each of the internal speakers is directed into a respective acoustic chamber and output via the output audio opens in the housing.
References
More filters
Patent
Sound reproducing system
TL;DR: In this paper, a sound reproducing system of the dual loud speaker type was proposed, in which one loud speaker is adapted to reproduce audio signals in the lower portion of the audio frequency range and the second loud speaker can be used to reproduce the audio signal in the higher portion.
PatentDOI
Multiple porting loudspeaker systems
TL;DR: A loudspeaker system has an enclosure of rectangular cross section with a baffle dividing the interior into first and second subchambers, each of which has a port tube coupling the subchamber to the region outside the enclosure as discussed by the authors.
PatentDOI
Electroacoustical transducing with at least three cascaded subchambers
TL;DR: In this paper, the authors describe an electroacoustical transducer having a vibratable diaphragm for converting an input electrical signal into a corresponding acoustic output signal.
PatentDOI
Loudspeaker with acoustic band-pass filter
TL;DR: In this paper, the transducer is mounted on a dividing wall between the first and second sub-chambers, and a first port couples the first subchamber with the second sub chamber and a second port can communicate with the outside environment surrounding the speaker.
PatentDOI
Multiple chamber loudspeaker system
TL;DR: In this article, an enclosure with a baffle dividing the interior into first and second sub-chambers is described, where the smaller subchamber is directly coupled to the region outside the enclosure by a port tube.