| Presentation | 1999/1/21 A Circular Rolled Diaphragm Tweeter Capable of Reproducing Super Treble Sound Kazuaki Tamura, Syoji Tanaka, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We developed a tweeter capable of reproducing super treble sound widely applicable to general and moderate audio product's loudspeakers, intended to improve tone quality or correspond to the audio format in DVD. Circular-rolled-shaped -like a upper surface of horizontally layed doughnut- diaphragm was devised, possessing higher treble resonance frequency, wide directivity, lesser cavity effect and driverbility with a small voice-coil. The cross section curve of the diaphragm wad fitted by computer FEM simulation. Air permeability in outer portion of the diaphragm with the unique paper making process realized to damp lower frequency resonance peak. Finally, using general pulp material, we realized reproducing frequency range up to 40kHz, smooth response in audible range and wide directivity rival with dome type tweeter. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | super treble sound / tweeter / diaphragm / treble resonance frequency / directivity / cavity effect |
| Paper # | US98-91,EA98-117 |
| Date of Issue |
| Conference Information | |
| Committee | US |
|---|---|
| Conference Date | 1999/1/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Ultrasonics (US) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Circular Rolled Diaphragm Tweeter Capable of Reproducing Super Treble Sound |
| Sub Title (in English) | |
| Keyword(1) | super treble sound |
| Keyword(2) | tweeter |
| Keyword(3) | diaphragm |
| Keyword(4) | treble resonance frequency |
| Keyword(5) | directivity |
| Keyword(6) | cavity effect |
| 1st Author's Name | Kazuaki Tamura |
| 1st Author's Affiliation | Audio Team 1, Consumer Products Development Group AVC Products Development Laboratory, AVC Company Matsushita Electric Industrial Co., Ltd.() |
| 2nd Author's Name | Syoji Tanaka |
| 2nd Author's Affiliation | Audio Team 1, Consumer Products Development Group AVC Products Development Laboratory, AVC Company Matsushita Electric Industrial Co., Ltd. |
| Date | 1999/1/21 |
| Paper # | US98-91,EA98-117 |
| Volume (vol) | vol.98 |
| Number (no) | 529 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |