38results about How to "Reduce sound leakage" patented technology

There is provided a piezoelectric device for generating an acoustic signal in which an expansion mechanism expands a disposition of a laminated piezoelectric actuator by the principle of leverage. The mass of a base member placed in the expansion mechanism is larger than the mass of a vibration output member. An overall device size is small. The piezoelectric device has a pressurization structure for reducing a tractive force acting on the laminated piezoelectric actuator which is generated by the amplification. This enables provision of a piezoelectric device for generating an acoustic signal that is a small size, highly resistant to dropping impact, and has god acoustic performance with less sound leakage.

A reproducing apparatus includes: a connecting part which is connected to an audio signal output apparatus through the three pole terminal; a storage part which stores content data including first and second channel audio data; a reproducing part which reproduces the content data; a first converting part which converts the first channel audio data included in the content data reproduced by the reproducing part into the first channel audio signal; a second converting part which converts the second channel audio data included in the content data reproduced by the reproducing part into the second channel audio signal; and a measuring part which measures at least any one of an amount of sound leakage in the second output unit caused by outputting the first channel audio signal and an amount of sound leakage in the first output unit caused by outputting the second channel audio signal.

The present invention provides a soundproof cover comprising: a sound-absorbing material having air permeability; and a skin material impregnated with a viscoelastic material and having air permeability, wherein the skin material is provided on a surface of the sound-absorbing material opposite to a sound source, and wherein the soundproof cover has a three-dimensional shape corresponding to an outer shape of the sound source.

An electromagnetic valve device for reducing noise resulting from an internal collision of a movable core against a guide member has a fixed core, a cylindrical movable core, a valve member, for reciprocating in an axial direction of the movable core in a cooperative manner with the movable core to open and close fluid paths, coil sections for forming a magnetic field by electrical conduction thereof to attract the movable core to the fixed core so as to move the movable core in the axial direction, and a guide member having a guide wall for guiding the movable core in the axial direction from inside of the movable core in its radial direction. A space is formed inside the guide wall in its radial direction.

A golf car includes an engine and a shroud that covers a cylinder body. The shroud communicates with a muffler cover, which covers a muffler. A silencer is provided at an outlet of the muffler. An elastic exhaust duct is connected to an exit end portion of the muffler cover. An undercover is located lower than the engine, and defines an underside of an engine room. The undercover includes an opening at a more rearward position than the muffler in a side view. The exhaust duct is routed above the undercover, includes a rearward end portion at the opening, and is fitted to the opening. Holders hold sound absorbing members on an inner circumferential surface of the exhaust duct.

The invention relates to a soundproof door framework, and in particular relates to a detachable soundproof door framework. The detachable soundproof door framework is composed of a support framework, a fixed sealed module, a detachable seal module and a lock body with a plug pin, wherein the support framework is welded by square steel or angle steel to form a rectangular framework, and the inner side of the support framework is welded on the edge frame of the door framework; the outer side of the support framework extends into a building wall of a door opening; the fixed sealed module is composed of a concave curve surface panel, a fixed module end surface panel and a fixed module arc panel and is welded integrally with the support framework; the detachable sealed module is composed of an inner side plate, a convex curve surface plate, a detachable module end surface panel and a detachable module arc panel and welded integrally; and the detachable sealed module is locked tightly with the door framework after being inserted into the fixed sealed module, and a test wire cable can be installed into the round opening of the detachable soundproof door framework, thereby reaching the aims that structure is compact, detaching is convenient, appearance is beautiful, and sealing soundproofness are achieved. The detachable soundproof door framework provided by the invention can be widely applied to engine laboratories and other acoustic testing rooms which need to replace testing wire cables.

The invention discloses an electronic device, which comprises a device main body (100) and a sound emitting device (200), wherein: the device main body (100) is provided with a first sound outlet hole (110) and at least two second sound outlet holes (120). ), the installation cavity (130) and the first sound guide channel (140), the first sound outlet hole (110) is located on the first side of the device body (100), and at least two second sound outlet holes (120) are located on the device body The second side of (100); the sounding device (200) is arranged in the installation cavity (130), and the sounding device (200) separates the installation cavity (130) into a first sub-cavity (131) and a second sub-cavity (132) ; The first sound outlet hole (110) communicates with the first sub-cavity (131), at least two second sound outlet holes (120) are arranged at intervals, and are connected to the second sub-cavity (132) through the first sound guide channel (140) ) connected. The above-mentioned solution can solve the problem that the current electronic equipment cannot take into account the security of the call and the clear call when making a call.

In one embodiment, earphones with bimodally fitting earbuds enable accurate reproduction of music while exposing a wearer to environmental noises on one side of the wearer. More specifically, an open earbud is designed to create a substantially open (i.e., unsealed) sound chamber around one ear while a closed earbud is designed to create a substantially closed sound chamber around the other ear. Because the open earbud is associated with sound leakage that alters both the intended level and the bass content of the music, the earphones include a signal redistribution subsystem that perspicaciously replaces at least a portion of this lost signal energy. Advantageously, such earphones expose the wearer to useful localized sounds, such as noises from an auto lane adjacent to a bike lane, while conveying the intended mix of music more accurately than conventional earphones with two open earbuds.

A bone conduction wave generation device includes a waveform generator which generates a first output wave and a second output wave for bone conduction. The waveform generator generates, on a basis of an input wave, the first output wave outside of an audible range and the second output wave outside of an audible range. The first output wave and the second output wave are to be combined into a composite wave having an audible beat.