Abstract: A thermoacoustic device includes a substrate, a sound wave generator and a signal device. The substrate has a net structure and includes a number of first wires and a number of second wires. The first wires and the second wires are crossed with each other. Each of the first wires includes a composite wire. The composite wire includes a carbon nanotube wire structure and a coating layer wrapping the carbon nanotube wire structure. The sound wave generator is located on a surface of the substrate and includes a graphene layer including at least one graphene. The signal input device is configured to input signals to the sound wave generator.

Abstract: The present invention relates to a thermoacoustic device that includes an acoustic element. The acoustic element includes a substrate, a plurality of microspaces, and a metal film. The metal film is located above the substrate. A plurality of microspaces is defined between the substrate and the metal film. The metal film is partially suspended above the substrate.

Abstract: A loudspeaker includes a magnetic system defining a magnetic gap, a vibrating system, and a supporting system. The vibrating system includes a diaphragm, a voice coil bobbin disposed in the magnetic gap, a coil lead wire having a first end and a second end, and a voice coil wound around the voice coil bobbin and electrically connected to the first end. The supporting system includes a frame fixed to the magnetic system and receiving the vibrating system. The frame has a terminal electrically connected to the second end of the coil lead wire. The diaphragm is received in the frame. The voice lead wire includes at least one carbon nanotube wire structure. The carbon nanotube wire structure includes a plurality of carbon nanotubes.

Abstract: A thermoacoustic device includes a sound wave generator, a signal element and a support element. The sound wave generator includes a carbon nanotube structure. The signal element is configured to transmit a signal. The carbon nanotube structure is configured to receive the signal and generate a sound wave. The support element includes a metal substrate and an insulating layer located on the metal substrate. The insulating layer is sandwiched between the metal substrate and the sound wave generator. The thermoacoustic device further includes two electrodes electrically connected to the carbon nanotube structure.

Abstract: A diaphragm includes a carbon nanotube film structure and an amorphous carbon structure composited with the carbon nanotube structure to form a stratiform composite structure. The carbon nanotube film structure defines a plurality of micropores therein. The amorphous carbon structure comprises a plurality of amorphous carbon particles received in the micropores.

Abstract: A bobbin includes a carbon nanotube film structure and an amorphous carbon structure. The carbon nanotube film structure defines a number of micropores therein. The amorphous carbon structure is composited with the carbon nanotube structure. The amorphous carbon structure comprises a number of amorphous carbon particles received in the micropores.

Abstract: A speaker includes an sound wave generator, at least one first electrode, at least one second electrode, an amplifier circuit, and a connector. The at least one first electrode and the at least one second electrode are electrically connected to the sound wave generator. The amplifier is electrically connected to the at least one first electrode and the at least one second electrode. The connector is electrically connected to the amplifier circuit. The sound wave generator includes a carbon nanotube structure and insulative reinforcement structure compounded with the carbon nanotube structure.

Abstract: A thermal acoustic speaker comprises a body and a thermoelectric converter. The body comprises a shell with at least one hole and a side with a sound hole. The shell defines a sound cavity in the body. The thermoelectric converter, disposed around at least a part of the shell, comprises a circuit and a conductive membrane and covers at least a part of the at least one hole. The circuit receives at least one electrical audio signal. The conductive membrane contacts a part of the circuit so that the thermoelectric converter heats air in the sound cavity to emit sound.

Abstract: A thermoacoustic module includes a substrate, at least one first electrode and at least one second electrode located on the substrate, a cover board spaced from the substrate, and a sound wave generator. The cover board defines a plurality of openings. The sound wave generator is located between the cover board and the substrate. The sound wave generator is electrically connected to the at least one first electrode and the at least one second electrode. The sound wave generator is capable of causing a thermoacoustic effect.

Abstract: A thermoacoustic units includes at least one first electrode, at least one second electrode, a sound wave generator electrically connected with the at least one first electrode and the at least one second electrode, a housing, and at least one socket connector. The housing receives the at least one first electrode, the at least one second electrode, and the sound wave generator therein. The at least one socket connector is located on the housing.

Abstract: An ultrasonic acoustic device includes a carbon nanotube structure. The carbon nanotube structure is capable of causing a thermoacoustic effect and generating ultrasonic sound wave in liquid medium.

Abstract: A flat speaker apparatus including a driving circuit module, a flat speaker and a thermally conductive connector, and with a heat dissipating structure is introduced. The flat speaker includes a porous electrode and a vibrating film. The porous electrode causes the vibrating film to vibrate according to an audio signal output from the driving circuit module for generating sound. The thermally conductive connector connects the driving circuit module and the flat speaker to conduct heat from the driving module to the flat speaker for dissipation. A method for heat dissipation of the flat speaker is also introduced herein.

Abstract: A thermoacoustic module includes a substrate, at least one first electrode and at least one second electrode located on the substrate, a sound wave generator, and at least one spacer. The sound wave generator is electrically connected to the at least one first electrode and the at least one second electrode. The at least one spacer is located between the substrate and the sound wave generator. The at least one spacer supports the sound wave generator. An interval is defined between the sound wave generator and the substrate. The sound wave generator is embedded in the at least one first electrode and the at least one second electrode.

Abstract: A thermoacoustic device includes a thermoacoustic module, a first protection component, a second protection component, and an infrared-reflective film. The thermoacoustic module includes a sound wave generator, at least one first electrode and at least one second electrode. The at least one first electrode and the at least one second electrode are electrically connected to the sound wave generator. The sound wave generator includes a carbon nanotube structure, and the first and second protection components are located on opposite sides of the sound wave generator. The infrared-reflective film is located on the first protection component.

Abstract: A thermoacoustic module includes a substrate, at least one first electrode, at least one second electrode, at least one first conductive bonding layer, at least one second conductive bonding layer, and a sound wave generator. The sound wave generator is electrically connected to and span across the at least one first electrode and the at least one second electrode. The at least one first electrode and the at least one second electrode are located on the substrate. The at least one first conductive bonding layer is located on the at least one first electrode. The at least one second conductive bonding layer is located on the at least one second electrode. The sound wave generator is spaced from the substrate and embedded in the at least one first and the at least one second conductive bonding layers.

Abstract: A thermoacoustic device includes a substrate, at least one first electrode, at least one second electrode and a sound wave generator. The at least one first electrode and the at least one second electrode are disposed on the substrate. The sound wave generator is contacting with the at least one first electrode and the at least one second electrode. The sound wave generator is suspended on the substrate via the first electrode and the second electrode. The sound wave generator includes a carbon nanotube structure.

Abstract: A thermoacoustic device includes a thermoacoustic module and a frame. The thermoacoustic module includes a sound wave generator, at least one first electrode and at least one second electrode. The sound wave generator includes at least one carbon nanotube structure. The at least one first electrode and the at least one second electrode are electrically connected to the sound wave generator. The frame secures the thermoacoustic module.

Abstract: A thermoacoustic module includes a substrate, at least one first electrode and at least one second electrode located on the substrate, a cover board spaced from the substrate, and a sound wave generator. The sound wave generator is located between the cover board and the substrate. The sound wave generator is electrically connected to the at least one first electrode and the at least one second electrode. The sound wave generator is capable of generating sound by causing a thermoacoustic effect.

Abstract: An amplifier circuit for thermoacoustic device includes a peak hold circuit, an add-subtract circuit, and a power amplifier. The peak hold circuit is configured to accept an audio signal and output a peak hold signal. The add-subtract circuit is configured to accept the audio signal and the peak hold signal, and output a modulated signal after a comparison operation of the audio signal and the peak hold signal. The power amplifier is configured to accept the modulated signal, amplify the modulated signal, and output an amplified voltage signal.

Abstract: A thermoacoustic device includes at least one first electrode, at least one second electrode, a sound wave generator and two protection components. The sound wave generator is electrically connected to the at least one first electrode and the at least one second electrode. The sound wave generator includes a carbon nanotube structure. The two protection components are located on opposite sides of the sound wave generator.

Abstract: A speaker includes a thermoacoustic module, an amplifier circuit board, and a frame. The thermoacoustic module includes a sound wave generator, at least one first electrode and at least one second electrode. The at least one first electrode and the at least one second electrode are electrically connected to the sound wave generator. The sound wave generator includes a carbon nanotube structure. The amplifier circuit board is electrically connected to the carbon nanotube structure by the at least one first electrode and at least one second electrode. The frame secures the thermoacoustic module and the amplifier circuit board.

Abstract: A thermoacoustic module includes a substrate, at least one first electrode, at least one second electrode, a sound wave generator, and at least one spacer. The sound wave generator electrically connect to, span between the at least one first electrode and the at least one second electrode. The at least one first electrode and the at least one second electrode are located on the substrate and provide support to the sound wave generator. The at least one spacer is located on the substrate, between the substrate and the sound wave generator. The at least one spacer supports the sound wave generator. An interval is defined between the sound wave generator and the substrate.

Abstract: A speaker includes a base and a thermoacoustic device. The base includes a first connector, a second connector for receiving external signals, a first engaging member, and an amplifier circuit device electrically connecting to the first connector and the second connector. The thermoacoustic device includes a second engaging member and a fourth connector. The thermoacoustic device is detachably installed on the base by a detachable engagement between the first engaging member and the second engaging member and a fourth connector corresponds to the first connector of the base.

Abstract: A thermoacoustic device includes first electrodes, a first conductive element, second electrodes, a second conductive element, first insulators, second insulators and a thermoacoustic film. The first conductive element is electrically connected with the first electrodes. The second conductive element is electrically connected with the second electrodes. The first insulators connect the first electrodes to the second conductive element while insulating them from each other, and the second insulators connect the second electrodes with the first conductive element while insulating them from each other. The thermoacoustic film is electrically connected with the first electrodes and the second electrodes.

Abstract: A thermoacoustic module includes a substrate, a sound wave generator, at least one first electrode and at least one second electrode. The substrate has a top surface, and the top surface defines at least one recess. The sound wave generator is located on the top surface of the substrate and includes at least one first region suspended above the at least one recess and at least one second region being in contact with the top surface of the substrate. The at least one first electrode and at least one second electrode are coupled to the sound wave generator.

Abstract: A thermoacoustic device includes a first electrode, a second electrode and a sound wave generator. The first electrode includes a first electrical conductor and a first conductive adhesive layer located on the first electrical conductor. The second electrode includes a second electrical conductor and a second conductive adhesive layer located on the second electrical conductor. The sound wave generator includes a carbon nanotube structure, and the sound wave generator is electrically connected to the first electrical conductor and the second electrical conductor via the first and second conductive adhesive layers. The adhesive layers permeate into the carbon nanotube structure.

Abstract: A flexible thermoacoustic device includes a soft supporter and a sound wave generator. The sound wave generator is located on a surface of the softer supporter. The sound wave generator includes a carbon nanotube structure. The carbon nanotube structure includes a plurality of carbon nanotubes combined by van der Waals attractive force.

Abstract: An acoustic projection screen includes a screen base and a carbon nanotube layer. The carbon nanotube layer is attached to the screen base and connected to electrodes.

Abstract: An illuminating device includes a holding element, a light source, and an acoustic member. The acoustic member includes a carbon nanotube structure.

Abstract: A thermoacoustic device includes a base, a plurality of first fasteners, at least one first electrode, at least one second electrode and a sound wave generator. Each of the first fasteners includes a body engaging with the base and a flexible element extending from the body. The at least one first electrode has a first end and a second end. The first end engages with the flexible element of the plurality of first fasteners, and the second end is secured on the base. The at least one second electrode has a third end and a fourth end. The third end engages with the flexible element of the plurality of first fasteners, and the fourth end is secured on the base. The sound wave generator is electrically connected to the at least one first electrode and the at least one second electrode.

Abstract: A thermoacoustic device includes a sound wave generator and a signal input device. The sound wave generator includes a graphene layer. The graphene layer includes at least one graphene. The signal input device inputs signals to the sound wave generator.

Abstract: A thermoacoustic device includes a substrate, at least two sound wave generators and at least two signal input devices. The substrate has at least two surfaces. Each of the at least two sound wave generators is located on each of the at least two surfaces. At least one of the at least two sound wave generator includes a carbon film. The carbon film includes at least one carbon nanotube layer and at least one graphene layer stacked with each other. The at least two signal input devices are configured to input signals to the at least two sound wave generator separately.

Abstract: A thermoacoustic device includes a sound wave generator and a signal input device. The sound wave generator includes a composite structure. The composite structure includes a carbon nanotube film structure and a graphene film. The carbon nanotube film structure includes a number of carbon nanotubes and micropores. The graphene film is located on a surface of the carbon nanotube film structure, and covers the micropores.

Abstract: A thermoacoustic device includes a carbon nanotube composite structure, a sound wave generator and a signal input device. The carbon nanotube composite structure includes a carbon nanotube structure and a matrix. The matrix is located a surface of the carbon nanotube structure. The sound wave generator is located on a surface of the carbon nanotube composite structure and insulated from the carbon nanotube structure via the matrix. The sound wave generator includes a graphene layer including at least one graphene. The signal input device is configured to input signals to the sound wave generator.

Abstract: A thermoacoustic device includes a substrate, a sound wave generator and a signal device. The substrate has a net structure and includes a number of first wires and a number of second wires. The first wires and the second wires are crossed with each other. Each of the first wires includes a composite wire. The composite wire includes a carbon nanotube wire structure and a coating layer wrapping the carbon nanotube wire structure. The sound wave generator is located on a surface of the substrate and includes a carbon film. The signal input device is configured to input signals to the sound wave generator.

Abstract: A thermoacoustic device includes a carbon nanotube composite structure, a sound wave generator and a signal input device. The carbon nanotube composite structure includes a carbon nanotube structure and a matrix. The matrix is located on a surface of the carbon nanotube structure. The sound wave generator is located on a surface of the carbon nanotube composite structure and insulated from the carbon nanotube structure via the coating layer. The sound wave generator includes a carbon film. The signal input device is configured to input signals to the sound wave generator.

Abstract: A thermoacoustic device includes a substrate, a sound wave generator and a signal device. The substrate has a net structure and includes a number of first wires and a number of second wires. The first wires and the second wires are crossed with each other. Each of the first wires includes a composite wire. The composite wire includes a carbon nanotube wire structure and a coating layer wrapping the carbon nanotube wire structure. The sound wave generator is located on a surface of the substrate and includes a graphene layer including at least one graphene. The signal input device is configured to input signals to the sound wave generator.

Abstract: A thermoacoustic device includes a substrate, at least two sound wave generators and at least two signal input devices. The substrate has at least two surfaces. Each of the at least two sound wave generators is located on each of the at least two surfaces. At least one of the at least two sound wave generator includes a carbon film. The carbon film includes at least one carbon nanotube layer and at least one graphene layer stacked with each other. The at least two signal input devices are configured to input signals to the at least two sound wave generator in a one by one manner.

Abstract: A thermoacoustic device includes a sound wave generator and an infra-red reflecting element having an infrared reflection coefficient higher than 30 percent. The infra-red reflecting element can be disposed at one side of the sound wave generator to reflect the emitted heat of the sound wave generator.

Abstract: A thermoacoustic device. The thermoacoustic includes a carbon nanotube structure. The carbon nanotube structure is at least partly in contact with a liquid medium. The thermoacoustic device is capable of causing a thermoacoustic effect in the liquid medium.

Abstract: An acoustic system includes a sound-electro converting device, a electro-wave converting device, and a sound wave generator. The electro-wave converting device is connected to the sound-electro converting device. The sound wave generator is spaced from the electro-wave converting device and includes a carbon nanotube structure. The sound-electro converting device converts a sound pressure to an electrical signal and transmits the electrical signal to the electro-wave converting device. The electro-wave converting device emits an electromagnetic signal corresponding to the electrical signal and transmits the electromagnetic signal to the carbon nanotube structure. The carbon nanotube structure converts the electromagnetic signal into heat, and the heat transfers to a medium causing a thermoacoustic effect.

Abstract: A thermoacoustic device includes a signal device and a sound wave generator. The sound wave generator includes a base structure and a conductive material located on the base structure. The base structure includes nano-scale elements. The signal device is capable of transmitting an electrical signal to the sound wave generator. The sound wave generator is capable of converting the electrical signal into heat. The heat is capable of being transferred to a medium to cause a thermoacoustic effect.

Abstract: In an acoustic wave sensor for detecting a distance to an object and an orientation where the object is located with using acoustic waves, an acoustic wave generating device generating an acoustic wave by applying thermal impact to the air with no mechanical vibration is used as a wave transmitting device, and an electric capacitance microphone converting variation of pressure due to acoustic wave to variation of an electric signal is used as each wave receiving device. Therefore, dead zone caused by reverberation component included in the acoustic wave transmitted from the wave transmitting device and dead zone caused by reverberation component included in wave receiving signals outputted from the wave receiving devices can be shortened and angular sensitivity of the acoustic wave sensor can be increased, in comparison with a conventional acoustic wave sensor using piezoelectric devices as the wave transmitting device and the wave receiving devices.

Abstract: An apparatus includes an electromagnetic signal device, a medium, and a sound wave generator. The sound wave generator includes a carbon nanotube structure. The electromagnetic signal device transmits an electromagnetic signal to the carbon nanotube structure. The carbon nanotube structure converts the electromagnetic signal into heat. The heat transfers to the medium and causes a thermoacoustic effect.

Abstract: A thermoacoustic device includes a sound wave generator, a plurality of first electrodes, a plurality of second electrodes, a first network and a second network. The sound wave generator includes a first surface and a second surface. The plurality of first electrodes are disposed on the first surface. The plurality of second electrodes are disposed on the second surface. The first electrodes and the second electrodes are alternately arranged. Each of the first network and the second network includes a plurality of conducting wires. The plurality of first electrodes are connected together by the plurality of conducting wires in the first network. The plurality of second electrodes are connected together by the plurality of conducting wires in the second network.

Abstract: A thermoacoustic device includes a sound wave generator, a number of first electrodes and a number of second electrodes. The sound wave generator includes a carbon nanotube structure. The second electrodes and the first electrodes are separately connected to the sound wave generator. The second electrodes and the first electrodes are parallel to each other and are alternately arranged at uniform intervals. A working voltage applied to the first and second electrodes is less than or equal to about 50 volts. The sound wave generator and the first and second electrodes satisfy a formula of 1 ? ? ? R 1 ( n - 1 ) 2 ? 125 ? ? . Wherein R1 represents a resistance of the sound wave generator in the direction from the first electrodes to the second electrodes, and n represents a sum of the total number of the first electrodes and the second electrodes.

Abstract: The present invention relates to a method for making a thermoacoustic device. The method includes the following steps. A substrate with a surface is provided. A plurality of microspaces is formed on the surface of the substrate. A sacrifice layer is fabricated to fill the microspaces. A metal film is deposited on the sacrifice layer, and the sacrifice layer is removed. A signal input device is provided to electrically connect with the metal film.

Abstract: A loudspeaker includes an enclosure and at least one sound wave generator disposed in the enclosure. The sound wave generator includes at least one carbon nanotube structure. The carbon nanotube structure is capable of converting electrical signals into heat. The heat is transferred to a medium and causes a thermoacoustic effect.

Abstract: An apparatus includes a headphone. The headphone includes at least one housing; and at least one sound wave generator disposed in the housing. The sound wave generator includes at least one carbon nanotube structure.

Abstract: The present disclosure relates to a method of producing sound waves. In the method, a carbon nanotube structure is provided. A signal is applied to the carbon nanotube structure and cause the carbon nanotube structure to produce heat. The heat is transferred to a medium in contact with the carbon nanotube structure to cause a thermoacoustic effect for producing sound waves.