# US 10,735,841 B2 · Dual-mode acoustic radiator speaker system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,735,841 B2 - Document ID: US10735841B2 - Status: Granted - Kind: B2 - Application number: 16/670,936 - Filed: 2019-10-31 - Published: 2020-02-27 - Granted: 2020-08-04 - Earliest claimed: 2018-03-18 - Assignees: FAIF Designs Ltd - Applicants: Walter Ka Wai Chu - Inventors: Walter Ka Wai Chu - Web page: https://patentgrep.com/patent/US10735841B2 ## CPC - H04R 1/025: {Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture} - H03F 3/72: Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal - H04R 1/24: Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges - H04R 1/2803: {for loudspeaker transducers} - H04R 1/2834: {for loudspeaker transducers} - H04R 1/2873: {for loudspeaker transducers} - H04R 3/00: Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F) - H04R 3/002: {Damping circuit arrangements for transducers, e.g. motional feedback circuits} - H03F 3/181: Low-frequency amplifiers, e.g. audio preamplifiers - H03F 2200/03: the amplifier being designed for audio applications - H04R 3/12: for distributing signals to two or more loudspeakers {(specially adapted for hearing aids H04R25/407)} - H04R 7/20: Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands - H04R 9/043: {Inner suspension or damper, e.g. spider (outer suspension or surround H04R7/16)} - H04R 2201/028: Structural combinations of loudspeakers with built-in power amplifiers, e.g. in the same acoustic enclosure (H04R2499/10 takes precedence; Single (sub)woofer with two or more satellite loudspeakers for mid- and high-frequency band reproduction driven via the (sub)woofer H04R2205/026) - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - H03F: AMPLIFIERS ## Abstract The present invention sets out to solve the problems above by presenting a dual-mode speaker system for acoustic reproduction. The dual-mode speaker system for acoustic reproduction presents a system with high-energy conversion efficiency and provides flexibility between an active speaker driver and other radiators, improved sound quality, a larger range of low frequency sounds, and the capability to improve audio frequency playback range in small-scale audio environments. A dual-mode acoustic radiator speaker system is provided having an enclosure with a plurality of openings, an active speaker driver having a first motor assembly and a dual-mode radiator having a second motor assembly. In some embodiments, the dual-mode acoustic radiator speaker system further comprises one or more passive radiators adjoined to the enclosure. Next, within the dual-mode acoustic radiator speaker system a power supply is connected to the electronic signal processing and amplification system. ## Claims ### Claim 1 A dual-mode acoustic radiator speaker system for acoustic reproduction comprising: an enclosure having an exterior shell and an internal volume, wherein in the enclosure includes a plurality of openings protruding through the exterior shell of the enclosure; an active speaker driver having a first motor assembly, wherein the active speaker driver is adjoined to the enclosure and aligned within one of the plurality of openings of the enclosure; a dual-mode radiator having a second motor assembly, wherein the dual-mode radiator is adjoined to the enclosure and aligned within one of the plurality of openings of the enclosure; a power supply; an electronic signal processing and amplification system positioned inside or outside the enclosure and connected to the power supply, the electronic signal processing and amplification system connected to and configured to drive the active speaker driver and the dual-mode radiator, the electronic signal processing and amplification system comprising: a first signal processing unit, wherein the first signal processing unit is programmed with a first set of transfer functions to control the active speaker driver; a second signal processing unit, wherein the second signal processing unit is programmed with a second set of transfer functions to control the dual-mode radiator; a signal prediction processing unit connected from the second signal processing unit to the first signal processing unit. ### Claim 2 (depends on 1) The system of claim 1, wherein the electronic signal processing and amplification system further comprises: a first signal amplifier connected to the active speaker driver; a second signal amplifier connected to the dual-mode radiator; a mode circuit having a first switch, a second switch and a resistor; wherein the mode circuit is configured to operate the modes of the dual-mode radiator. ### Claim 3 (depends on 2) The system of claim 2, wherein the signal prediction processing unit of the electronic signal processing and amplification system is programmed with a third set of transfer functions to: (a) generate a counter-signal to the first signal processing unit; and, (b) drive the active speaker driver via the first signal processing unit for canceling out most of the internal air pressure variations from the motions of the dual-mode radiator. ### Claim 4 (depends on 1) The system of claim 1, wherein the enclosure further comprises a port protruding through the exterior shell of the enclosure. ### Claim 5 (depends on 2) The system of claim 2, wherein the first switch is disconnected from the second signal amplifier, such that the first switch controls the dual-mode radiator to perform as a passive radiator. ### Claim 6 (depends on 2) The system of claim 2, wherein the second switch is in parallel with the dual-mode radiator and therein controls the dual-mode radiator to perform as a passive radiator with electrical dampening. ### Claim 7 (depends on 2) The system of claim 2, wherein the first switch is connected from the second signal amplifier, such that the first switch controls the dual-mode radiator to perform as an active speaker. ### Claim 8 (depends on 1) The system of claim 1, wherein the electronic signal processing and amplification system further comprises an input device configured to receive an input. ### Claim 9 (depends on 1) The system of claim 1, wherein the dual-mode acoustic radiator speaker system further comprises a plurality of dual-mode radiators. ### Claim 10 (depends on 1) The system of claim 1, further comprising one or more passive radiators. ### Claim 11 (depends on 10) The system of claim 10, wherein the signal prediction processing unit of the electronic signal processing and amplification system is programmed with a fourth set of transfer functions to: (a) generate a counter-signal to the first signal processing unit; and, (b) drive the active speaker driver via the first signal processing unit for canceling out most of the internal air pressure variations from the motions of the dual-mode radiator and the one or more passive radiator. ### Claim 12 (depends on 2) The system of claim 2, wherein the transfer function of the first signal processing unit, the transfer function of the second signal processing unit, and the transfer function of the signal prediction processing unit will be altered according to the mode circuit configurations.