http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-200533220-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bc905cbef116a1ec61d12125af9427f3 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04R5-02 |
| filingDate | 2004-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9e91dc07ac59d12f421c6d616c5580d4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7d6c066dcce1b82b12fdd678bfe262d9 |
| publicationDate | 2005-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-200533220-A |
| titleOfInvention | Piezoelectric loudspeaker |
| abstract | A piezoelectric loudspeaker is disclosed, which can generate and transfer sound wave to the external sound field. It combines the resonant cavity having spatial resonant frequency with a sound channel having increasing cross section to increase the sound pressure level and increase the usable range of frequencies. The sound wave channel has an inlet and an outlet, and the inlet is connected to the opening of the resonant cavity. The outlet communicates with the external sound field. The cross section area of the outlet increases from the inlet to the outlet. The sound wave transmitted by the resonant cavity passes through the opening and enters into the sound wave channel, and then enters the external sound field. The resonant cavity joins with the piezoelectric actuator. The mechanical deformation generated by the piezoelectric actuator compresses the air to generate sound wave, and resonance of sound wave is generated in the resonant cavity for amplification. Then, the sound wave enters the sound channel for being transferred to the external sound field. |
| priorityDate | 2004-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.