| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 381351000 | Plural chambers | 10 |
| 20120099751 | ATTACHABLE EXTERNAL ACOUSTIC CHAMBERS FOR A MOBILE DEVICE - A wireless mobile electronic device includes a first housing and a first acoustic chamber disposed within the first housing. A sound generator, within said first housing, is acoustically coupled to the first acoustic chamber. Additionally, a first acoustic port defines an opening into the first acoustic chamber. The acoustic port includes a first mating structure configured for mating with a second mating structure of a second acoustic chamber, exclusive of said first housing. | 04-26-2012 |
| 20090296971 | Hearing Instrument Receiver With Improved Low-Frequency Efficiency - The low frequency efficiency of a hearing instrument receiver can be improved by increasing the unoccupied rear volume. The receiver may be configured with one or more motor and diaphragm assemblies. The receiver may also be fabricated using multiple, conventional receivers with an added housing to create the increased, unoccupied rear volume. | 12-03-2009 |
| 20080219490 | SPEAKER SET FOR ELECTRONIC PRODUCT - A speaker set ( | 09-11-2008 |
| 20120070026 | SPEAKER SYSTEM - A speaker system includes a case having a receiving chamber; a variable mechanism received in the receiving chamber for dividing the receiving chamber into a first chamber and a second chamber and being capable of varying a volume of the first chamber; and a speaker unit is received in the first chamber and defining an acoustic port facing an exterior of the case. The separating wall alternatively inserts into one of the receiving member for placing the separating wall precisely at specific locations. Thus, it is easy to vary the volume of the first chamber for achieving an excellent acoustic capability of the speaker system. | 03-22-2012 |
| 20110058700 | Inverse Horn Loudspeakers - In a low frequency transducer system a multi-compression chamber, inverse horn structure is employed in combination with a resonance-distortion filter chamber. The filter chamber effectively expands the effective enclosure volume at low frequencies and connected to one of the compression chambers filter parasitic resonances and distortion and allowing the system to more efficiently reproduce low frequencies while being able to use smaller diameter transducers and maintaining good system sensitivity. Compression chambers are organized for constant or continuous compression on a section-by-section basis throughout the inverse horn system. | 03-10-2011 |
| 20100310106 | IN-EAR HEADPHONES - An earphone is disclosed that is used in connection with reproducing audio sounds that are supplied from an audio-frequency source. The earphone includes a housing that includes a boot assembly positioned in the housing. A first audio driver is positioned in the boot assembly such that a first output of the first audio driver is in acoustic communication with a mixing chamber. A second audio driver is also positioned in the boot assembly such that a second output of the second audio driver is in acoustic communication with a chamber in the boot assembly. A tubular needle is positioned in the boot assembly having a first end in acoustic communication with the chamber and a second end in acoustic communication with the mixing chamber. | 12-09-2010 |
| 20100177921 | RESPONSE SPEAKER SYSTEM - A sound generator like a guitar supplies an electrical out put to operate speakers that are mounted in a chassis. The electrical output is divided into three frequency ranges, separately amplified and delivered to speakers mounted in a three separate enclosures each acoustically isolated from the other. | 07-15-2010 |
| 20080219489 | SPEAKER SET AND ELECTRONIC PRODUCT INCORPORATING THE SAME - An electronic product ( | 09-11-2008 |
| 20090190784 | MULTI CHAMBER PORTED STEREO SPEAKER - A method and apparatus for a multi-chamber ported stereo speaker is disclosed. The stereo speaker is a single unit with multi-chambers in an enclosure box. The multi chamber ported speaker comprises an enclosure housing a shared acoustic chamber having an external port for allowing air external of the enclosure box to flow into the shared acoustic chamber, and at least two additional chambers comprising a corresponding internal port in each additional chamber for forming an air pass from each additional chamber with the shared chamber, each additional chamber comprising a corresponding driver mounted through a wall of the chamber and enclosure box for forming the ported speaker. | 07-30-2009 |
| 20130129135 | MULTIPLE-USE ACOUSTIC PORT - Two or more acoustic transducers share the same acoustic port in a device. The acoustic properties—such as acoustic impedance and frequency response—of the shared acoustic port are matched to each of the two or more acoustic transducers. To accomplish acoustic impedance matching, a separate back volume is provided for each of the acoustic transducers, matched to that transducer. Frequency response matching can be accomplished by the design of the transducer itself, but also by providing an adjacent element in the acoustic system of the transducer. One transducer may serve as an element in the acoustic system of another transducer. Frequency response adjustment of an individual element may also affect acoustic impedance of the entire port-transducer system. | 05-23-2013 |
