JP2014526218A - オーディオ信号を発生させる技術 - Google Patents
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- H04R1/00—Details of transducers, loudspeakers or microphones
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- H—ELECTRICITY
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- G—PHYSICS
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- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
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- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
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- H—ELECTRICITY
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- H04R19/00—Electrostatic transducers
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- H—ELECTRICITY
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- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
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- H—ELECTRICITY
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- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
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- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/003—Mems transducers or their use
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Abstract
【選択図】図3
Description
S(t)=Cos(Ωt)(A”(t)+1) (1)
と特徴付けることができる。ここでA”(t)は、時間に関するA(t)の2次導関数である。B=A”の場合、周波数領域における方程式(1)は、
S(f)=1/2*[B(f−Ω)+B(f+C)+delta(f−Ω)+delta(f+Ω)] (2)
と特徴付けることができる。ここでB(f)はオーディオ信号のスペクトラムであり、delta(f)はディラック(Dirac)のデルタ関数である。
S(t)=Cos2(Ωt)(A”(t)+1) (3)
と特徴付けることができ、周波数領域において数学的関係は、
S’(f)=1/4*[B(f−2Ω)+B(f+2Ω)+2B(f)+delta(f)+delta(f−2Ω)+(f+2Ω)] (4)
と特徴付けることができる。
Claims (21)
- 第1平面内に位置決めされた膜であって、超音波音響信号を発生させるのに効果的な第1方向経路に沿ってかつ第1周波数で、振動するように構成された膜と、
前記第1平面から実質的に分離された第2平面内に位置決めされたシャッタであって、前記超音波音響信号を調節してオーディオ信号を発生させるように構成されたシャッタとを備える、スピーカデバイス。 - 前記シャッタは、前記第1方向経路に実質的に垂直の第2方向経路に沿って移動するのに効果的に構成される、請求項1に記載のスピーカデバイス。
- 前記シャッタは、前記第2方向経路に沿って第2周波数で移動するように構成され、前記オーディオ信号の周波数は、前記第1周波数と前記第2周波数の差に実質的に等しい、請求項2に記載のスピーカデバイス。
- 前記第1平面内の前記膜と前記第2平面内の前記シャッタとの間に位置決めされた第3平面内に位置決めされたブラインドをさらに備える、請求項2に記載のスピーカデバイス。
- 前記膜、前記ブラインド、および前記シャッタは、互いに実質的に平行な平面内に位置決めされる、請求項4に記載のスピーカデバイス。
- 前記シャッタは、第1位置と第2位置の間の前記第2方向経路に沿って移動するように構成され、前記第1位置および前記第2位置は前記第2方向経路に沿って変位を画定し、前記変位は前記ブラインドに属する前記第1セットの開口部のうちの隣接する2つの開口部間の距離に実質的に等しい、請求項4に記載のスピーカデバイス。
- 前記シャッタは、第2セットの開口部を含む、請求項6に記載のスピーカデバイス。
- 前記シャッタが前記第1位置にあるとき、前記第1セットの開口部は、前記第2セットの開口部と実質的に一列に整列する、請求項7に記載のスピーカデバイス。
- 前記第1平面および前記第2平面から実質的に分離された第3平面内に位置決めされたブラインドをさらに備える、請求項2に記載のスピーカデバイス。
- 前記膜および前記シャッタは、前記スピーカデバイス内の1つのアレイのスピーカからの単一のスピーカを備える、請求項1に記載のスピーカデバイス。
- オーディオ信号を発生させる方法であって、
第1平面内に位置決めされた膜を、超音波音響信号を発生させるのに効果的な第1方向経路に沿ってかつ第1周波数で、選択的に振動させるステップと、
前記第1平面から分離された第2平面内に位置決めされたシャッタを、前記超音波音響信号を調節して前記オーディオ信号を発生させるのに効果的に、選択的に移動させるステップとを備える、方法。 - 前記シャッタを移動させるステップは、前記第1方向経路に実質的に垂直の第2方向経路に沿って前記シャッタを移動させるステップをさらに備える、請求項11に記載の方法。
- 前記シャッタを前記第2方向経路に沿って第2周波数で移動させるステップをさらに備え、前記オーディオ信号の周波数は、前記第1周波数と前記第2周波数の差に実質的に等しい、請求項12に記載の方法。
- 前記シャッタを前記第2方向経路に沿って移動させるステップは、前記シャッタを第1位置と第2位置の間に移動させるステップをさらに備える、請求項12に記載の方法。
- 前記第1位置と前記第2位置の間の変位は、前記ブラインド上の隣接する2つの開口部間の距離と関連付けられる、請求項14に記載の方法。
- 第1スピーカデバイスであって、
第1平面内に位置決めされた第1膜であって、第1超音波音響信号を発生させるのに効果的な第1方向経路に沿ってかつ第1周波数で、振動するように構成された第1膜、および
前記第1平面から実質的に分離された第2平面内に位置決めされた第1シャッタであって、前記第1超音波音響信号を調節して第1オーディオ信号を発生させるように構成された第1シャッタを備える、第1スピーカデバイスと、
第2スピーカデバイスであって、
前記第1平面内に位置決めされた第2膜であって、第2超音波音響信号を発生させるのに効果的な前記第1方向経路に沿ってかつ第2周波数で、振動するように構成された第2膜、および
前記第2平面内に位置決めされた第2シャッタであって、前記第2超音波音響信号を調節して第2オーディオ信号を発生させるように構成された第2シャッタを備える、第2スピーカデバイスとを備える、スピーカアレイ。 - 前記第1周波数および前記第2周波数は、実質的に同一である、請求項15に記載のスピーカアレイ。
- 前記第1シャッタは、第3周波数で、前記第1方向経路に実質的に垂直の第2方向経路に沿って移動するように構成され、前記第2シャッタは、第4周波数で、前記第2方向経路に沿って移動するように構成される、請求項15に記載のスピーカアレイ。
- 前記第3周波数および前記第4周波数は、実質的に同一である、請求項18に記載のスピーカアレイ。
- 前記第2シャッタが、前記第2スピーカデバイスの上端部を覆うように適合される一方、前記第1シャッタは、前記第1スピーカデバイスの上端部を覆うように同時に適合される、請求項19に記載のスピーカアレイ。
- 前記第2シャッタが、前記第2スピーカデバイスの上端部で開口部を見せるように適合される一方、前記第1シャッタは、前記第1スピーカデバイスの上端部を覆うように同時に適合される、請求項19に記載のスピーカアレイ。
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PCT/US2011/047833 WO2013025199A1 (en) | 2011-08-16 | 2011-08-16 | Techniques for generating audio signals |
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US (3) | US8861752B2 (ja) |
EP (2) | EP3018916B1 (ja) |
JP (1) | JP5859648B2 (ja) |
KR (1) | KR101568825B1 (ja) |
CN (1) | CN103765920B (ja) |
AU (1) | AU2011374985C1 (ja) |
CA (1) | CA2845204C (ja) |
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AU2011374985C1 (en) | 2015-11-12 |
WO2013025199A1 (en) | 2013-02-21 |
JP5859648B2 (ja) | 2016-02-10 |
CA2845204A1 (en) | 2013-02-21 |
US10448146B2 (en) | 2019-10-15 |
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IL230953A0 (en) | 2014-03-31 |
EP2745536A4 (en) | 2015-05-13 |
EP2745536B1 (en) | 2016-02-24 |
CN103765920A (zh) | 2014-04-30 |
US9866948B2 (en) | 2018-01-09 |
US20150055811A1 (en) | 2015-02-26 |
KR20140046482A (ko) | 2014-04-18 |
CN103765920B (zh) | 2017-03-01 |
US8861752B2 (en) | 2014-10-14 |
EP2745536A1 (en) | 2014-06-25 |
AU2011374985B2 (en) | 2015-06-11 |
EP3018916B1 (en) | 2020-02-19 |
AU2011374985A1 (en) | 2014-03-27 |
KR101568825B1 (ko) | 2015-11-12 |
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