Abstract: An actuator is provided, including a plurality of conducting layers and a plurality of electret layers. The electret layers are respectively sandwiched between the conducting layers, and form gaps between the conducting layers. Directions of preset electric fields of the adjacent electret layers are opposite, and the adjacent conducting layers are respectively electrically connected to a first voltage end and a second voltage end to receive a driving voltage.

Abstract: An actuator is provided, including a plurality of conducting layers and a plurality of electret layers. The electret layers are respectively sandwiched between the conducting layers, and form gaps between the conducting layers. Directions of preset electric fields of the adjacent electret layers are opposite, and the adjacent conducting layers are respectively electrically connected to a first voltage end and a second voltage end to receive a driving voltage.

Abstract: A speaker structure includes a speaker box, a speaker unit, and an elastic component. An air pressure inside the speaker box is lower than that outside the speaker box. The speaker unit is disposed on the speaker box and includes a first vibrating assembly. The elastic component is disposed in the speaker box and connected to the first vibrating assembly and the speaker box in the speaker unit. When the speaker unit operates, the first vibrating assembly of the speaker unit vibrates, and the elastic component produces a pre-force correspondingly, the total pressure of the pre-force and the air pressure inside the speaker box equals to the air pressure outside the speaker box to balance the first vibrating assembly at an equilibrium position.

Abstract: A wearable communication device includes an annular shell, a processing module, a first piezoelectric unit, and a driving unit. A cavity is formed at a part of the annular shell. The processing module processes communication data. The first piezoelectric unit is disposed in the cavity. The driving unit is used to receive the communication data and drive the first piezoelectric unit according to the communication data to make the first piezoelectric unit vibrate and trigger a corresponding audio signal. The wearable communication device can be wirelessly connected to an electronic device without physical wires to improve the convenience greatly.

Abstract: An audio signal processing method includes following steps: playing a fundamental frequency signal by a media player; calculating a first fundamental frequency sound pressure value and a first harmonic sound pressure value of the fundamental frequency signal, and calculating a second fundamental frequency sound pressure value and a second harmonic sound pressure value of the audio signal; calculating a threshold sound pressure value according to the first fundamental frequency sound pressure value, the first harmonic sound pressure value, and the second fundamental frequency sound pressure value; and comparing the second harmonic sound pressure value and the threshold sound pressure value to generate a comparing result, and adjusting the second harmonic sound pressure value according to the comparing result. An audio signal processing device is also disclosed.

Abstract: A speaker structure includes a speaker box, a speaker unit, and an elastic component. An air pressure inside the speaker box is lower than that outside the speaker box. The speaker unit is disposed on the speaker box and includes a first vibrating assembly. The elastic component is disposed in the speaker box and connected to the first vibrating assembly and the speaker box in the speaker unit. When the speaker unit operates, the first vibrating assembly of the speaker unit vibrates, and the elastic component produces a pre-force correspondingly, the total pressure of the pre-force and the air pressure inside the speaker box equals to the air pressure outside the speaker box to balance the first vibrating assembly at an equilibrium position.

Abstract: An innovative magnetic design for speakers is disclosed. The innovative magnetic design of the present invention comprises an upper magnetic portion, a lower magnetic portion, at least one magnetic piece and two or more magnets. Either the upper magnetic portion or the lower magnetic portion has the form of a plate. A magnet is disposed between the upper magnetic portion and the magnetic piece, and another magnet is disposed between the lower magnetic portion and the magnetic piece. When an AC current flows through the voice coil, a magnetic force induced by the current would move the voice coil and diaphragm longitudinally, thereby generating audible sounds. In addition, we only have to increase the length of magnets 4 to increase their volume so as to increase the magnetic force and hence offset the decrease in the magnetic force due to a thinner configuration.

Abstract: An audio signal processing method includes following steps: playing a fundamental frequency signal by a media player; calculating a first fundamental frequency sound pressure value and a first harmonic sound pressure value of the fundamental frequency signal, and calculating a second fundamental frequency sound pressure value and a second harmonic sound pressure value of the audio signal calculating a threshold sound pressure value according to the first fundamental frequency sound pressure value, the first harmonic sound pressure value, and the second fundamental frequency sound pressure value; and comparing the second harmonic sound pressure value and the threshold sound pressure value to generate a comparing result, and adjusting the second harmonic sound pressure value according to the comparing result. An audio signal processing device is also disclosed.

Abstract: A wearable communication device includes an annular shell, a processing module, a first piezoelectric unit, and a driving unit. A cavity is formed at a part of the annular shell. The processing module processes communication data. The first piezoelectric unit is disposed in the cavity. The driving unit is used to receive the communication data and drive the first piezoelectric unit according to the communication data to make the first piezoelectric unit vibrate and trigger a corresponding audio signal. The wearable communication device can be wirelessly connected to an electronic device without physical wires to improve the convenience greatly.

Abstract: An electrical signal to audio signal transducer with a deformable diaphragm unit includes a connective portion and a deformable diaphragm unit. The connective portion connects the deformable diaphragm unit with a wall of a box. The deformable diaphragm unit is linked up with a through opening of the connective portion to form a passage. Push and pull exerted on the deformable diaphragm unit by the magnetic force induced by the current flows through the voice coil can cause deformable diaphragm unit to deform and move in a reciprocating manner and thus generate audible sounds. Therefore, with the transducer of the present invention, poor performance due to the dimensional constrain may be overcome.

Abstract: A system, and an apparatus of speaker, and a method for forming a virtual audio is provided. An audio source is processed by a second audio source processing program according to parameters which are entered by the user, and filtered to be a high frequency audio signal. The audio source with orientation is outputted by the orientation speaker.

Abstract: A keyboard structure includes a frame, a button, a first circuit unit and a second circuit unit. The frame includes at least a through hole. The button is disposed at the through hole and magnetically connected with the frame. The first circuit unit includes a first electrical contact point disposed corresponding to the button. The second circuit unit includes a second electrical contact point disposed corresponding to the first electrical contact point. When the button is pressed, the button and the frame are separated, and the first electrical contact point contacts with the second electrical contact point.

Abstract: A speaker capable of emitting light includes a housing, a plurality of light generators, and a speaker core. The housing formed by material capable of conducting light, used as a speaker chamber of the speaker, has a first opening and a second opening. The plurality of light generators is formed nearby the second opening for generating light. The speaker core is set in the first opening of the housing for generating sound.

Abstract: A system, and an apparatus of speaker, and a method for forming a virtual audio is provided. An audio source is processed by a second audio source processing program according to parameters which are entered by the user, and filtered to be a high frequency audio signal. The audio source with orientation is outputted by the orientation speaker.

Abstract: The present invention discloses a heat energy recycling device for an engine and a two-stroke engine using the same, which recycles the heat energy of the exhaust gas of a two-stroke engine and uses a technology of directly injecting high-pressure and high-temperature water into the cylinder. At an appropriate timing, fuel supply is intermitted, and high-pressure and high-temperature water is injected into the cylinder before or at the beginning of the explosion stroke. The high-pressure and high-temperature water vaporizes instantly inside the cylinder because the saturation temperature at the pressure is much lower than the temperature of the water. The water vapor pushes the piston to move and generates a water dynamic stroke. During the water dynamic stroke, the gas inside the cylinder expands, and the temperature thereof decreases. Thus, the gas inside the cylinder has a temperature lower than that of the cylinder and absorbs heat from the cylinder wall.

Abstract: A speaker capable of emitting light includes a housing, a plurality of light generators, and a speaker core. The housing formed by material capable of conducting light, used as a speaker chamber of the speaker, has a first opening and a second opening. The plurality of light generators is formed nearby the second opening for generating light. The speaker core is set in the first opening of the housing for generating sound.

Abstract: The present invention provides a wireless handset for voice over Internet protocol (VoIP). The VoIP wireless handset can be inserted into a PC card socket of a computer for convenient storage and charging of the wireless handset. The VoIP wireless handset comprises a speaker, a microphone, a printed circuit board, a connector and a case. The speaker, the microphone, and the connector are connected via the printed circuit board electronically, and the printed circuit board is covered by the case. The printed circuit board has a processor and a transmission interface, and the transmission interface is adapted to transmit voice data between the VoIP wireless handset and the computer. The voice data can be transmitted to a communications device at a remote point through the Internet via the computer.