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1. (WO2007001035) ULTRASONIC SPEAKER SYSTEM
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/001035 International Application No.: PCT/JP2006/312927
Publication Date: 04.01.2007 International Filing Date: 28.06.2006
IPC:
H04R 3/00 (2006.01) ,H04R 1/32 (2006.01) ,H04R 1/40 (2006.01) ,H04R 13/00 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3
Circuits for transducers
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1
Details of transducers
20
Arrangements for obtaining desired frequency or directional characteristics
32
for obtaining desired directional characteristic only
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1
Details of transducers
20
Arrangements for obtaining desired frequency or directional characteristics
32
for obtaining desired directional characteristic only
40
by combining a number of identical transducers
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
13
Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
Applicants:
株式会社アノディックサプライ ANODIC SUPPLY CO., LTD. [JP/JP]; 〒1250054 東京都葛飾区高砂3丁目11番14号 Tokyo 3-11-14, Takasago, Katsushika-ku, Tokyo 1250054, JP (AllExceptUS)
石川 雅一 ISHIKAWA, Masaichi [JP/JP]; JP (UsOnly)
藤田 猛 FUJITA, Takeshi [JP/JP]; JP (UsOnly)
古川 芳宏 FURUKAWA, Yoshihiro [JP/JP]; JP (UsOnly)
Inventors:
石川 雅一 ISHIKAWA, Masaichi; JP
藤田 猛 FUJITA, Takeshi; JP
古川 芳宏 FURUKAWA, Yoshihiro; JP
Agent:
佐野 弘 SANO, Hiroshi; 〒1040042 東京都中央区入船1丁目2番9号 八丁堀MFビル9階 Tokyo 9F, Hatchobori MF Building 2-9, Irifune 1-chome, Chuo-ku Tokyo 1040042, JP
Priority Data:
2005-18823628.06.2005JP
Title (EN) ULTRASONIC SPEAKER SYSTEM
(FR) SYSTÈME HAUT-PARLEUR À ULTRASONS
(JA) 超音波スピーカシステム
Abstract:
(EN) In an ultrasonic speaker system, it is possible to faithfully converting an audio signal waveform into an air vibration, to obtain a strong output with a simple configuration, and form a preferable acoustic environment. In a pulse width modulation unit of the ultrasonic speaker system, an oscillation signal s0 and an audio signal s1 are inputted to a comparison unit (not depicted) and according to the comparison result, a binary modulation signal s2 is formed with voltage information on the audio signal s1 recorded as a pulse width (time information). When the modulated signal s2 is outputted from an ultrasonic speaker (6), eardrums of the listener can hear the audio as a sound volume of the frequency of the amplitude frequency of the pulse width and the amplitude of the ultrasonic wave (a difference between tmax and tmin shown in Fig. 5(c)).
(FR) L’invention concerne un système haut-parleur à ultrasons, avec lequel il est possible de convertir fidèlement une forme d’onde de signal audio en vibrations de l’air de façon à obtenir une sortie puissante avec une configuration simple et de constituer un environnement sonore de qualité. Dans une unité de modulation par largeur d’impulsion du système haut-parleur à ultrasons, un signal d’oscillation s0 et un signal audio s1 sont fournis à une unité de comparaison (non décrite) et, en fonction du résultat de la comparaison, un signal de modulation binaire s2 est formé avec l’information de tension du signal audio s1 enregistré en tant que largeur d’impulsion (information de durée). Lorsque le signal modulé s2 est fourni à un haut-parleur à ultrasons (6), les tympans de l’auditeur peuvent entendre l’audio en tant que volume sonore de la fréquence de la fréquence d’amplitude de la largeur d’impulsion et de l’amplitude de l’onde ultrasonore (une différence entre tmax et tmin représentée dans la figure 5(c)).
(JA)  超音波スピーカシステムにおいて、音声信号の波形を忠実に空気振動に変換し、簡易な構成で大きな出力を得るとともに良好な音響環境を形成する。  超音波スピーカシステムのパルス幅変調部において、発振信号sと音声信号sとの比較部(図示せず)に入力され、比較結果により、音声信号sの電圧情報がパルス幅(時間情報)として記録された2値の変調信号sが形成される。変調信号sを超音波スピーカ6から出力すると、聴取者の鼓膜には、パルス幅の振幅周波数の周波数、超音波の振幅量(図5(c)に示す、tmaxとtminとの差)の音量としての音声が聴取される。
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)