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1. (WO2001035696) DIGITAL LOUDSPEAKER
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/035696 International Application No.: PCT/GB2000/004259
Publication Date: 17.05.2001 International Filing Date: 07.11.2000
Chapter 2 Demand Filed: 15.05.2001
IPC:
H04R 1/00 (2006.01) ,H04R 7/04 (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
1
Details of transducers
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
7
Diaphragms for electromechanical transducers; Cones
02
characterised by the construction
04
Plane diaphragms
Applicants: BANK, Graham[GB/GB]; GB (UsOnly)
NEW TRANSDUCERS LIMITED[GB/GB]; 37 Ixworth Place London SW3 3QH, GB (AllExceptUS)
Inventors: BANK, Graham; GB
Agent: MAGUIRE BOSS; 5 Crown Street St. Ives Cambridgeshire PE27 5EB, GB
Priority Data:
9926489.710.11.1999GB
Title (EN) DIGITAL LOUDSPEAKER
(FR) HAUT-PARLEUR NUMERIQUE
Abstract:
(EN) A hybrid digital loudspeaker (10, 30) comprising at least two separate loudspeakers systems (12, 14, 32), each loudspeaker system being adapted to cover a different frequency range and each loudspeaker system being fed with a signal of different resolution, such that the resolution is varied with frequency according to sensitivity and discrimination of a user's hearing. The invention takes advantage of studies of the properties of hearing which show that the ear does not have a constant level of sensitivity and discrimination over the audible frequency range. Typically the hybrid digital loudspeaker (10, 30) has a low frequency loudspeaker system (12, 32) and an upper frequency loudspeaker system (14). The low frequency loudspeaker system (12, 32) is fed a signal (22) of lower resolution than the upper frequency loudspeaker system (14).
(FR) L'invention concerne un haut-parleur numérique hybride (10, 30) comprenant au moins deux systèmes (12, 14, 32) de haut-parleur séparés, chacun des systèmes de haut-parleur étant conçus pour couvrir une plage de fréquence différente et chacun de ces systèmes étant alimentés par un signal de résolution différente, de sorte que la résolution varie avec la fréquence en fonction de la sensibilité et de la discrimination de l'audition de l'utilisateur. L'invention tire parti des études concernant les propriétés d'audition qui montrent que l'oreille ne possède pas un niveau constant de sensibilité et de discrimination sur la plage de fréquence audible. En général, le haut-parleur numérique hybride (10, 30) comporte un système de haut-parleur à basse fréquence (12, 32) et un système de haut-parleur à haute fréquence (14). Le système de haut-parleur à basse fréquence (12, 32) est alimenté par un signal (22) de résolution inférieure par rapport au système de haut-parleur à haute fréquence (14).
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)