1014results about How to "Improve acoustic performance" patented technology

A hearing aid body is provided that contains electronic hearing aid components and that is attachable to the user's body outside the ear canal. A conduit connects the hearing aid body to the flexible plug. The conduit enables sound emitted by the hearing aid to travel via the conduit to the flexible plug so that the user's able to hear a sound that is amplified by the hearing aid and received by the plug via the conduit. The conduit can be a flexible hollow tube or an electronic conduit that transmit electrical signals between the hearing aid and the plug. A stent embedded in the plug is provided, the stent having a first smaller diameter at a temperature below body temperature and being expandable to a second greater diameter when subjected to the user's body temperature, such as the temperature in the ear canal of a user.

A speech signal processing system combines acoustic noise reduction and echo cancellation to enhance acoustic performance. The speech signal processing system may be used in vehicles or other environments where noise-suppressed communication is desirable. The system includes an adaptive beamforming signal processing unit, an adaptive echo compensating unit to reduce acoustic echoes, and an adaptation unit to combine noise reduction and adaptive echo compensating.

The invention discloses a preparation method of a sound absorbing material, the sound absorbing material and a filling method of same. The preparation method comprises the following steps: (S1) preparing a non-foamed slurry material; (S2) producing a flammable material framework and a shape-cover container, and placing the flammable material framework into the shape-cover container; (S3) forming the non-foamed slurry material in the shape-cover container to form a wet formed body; (S4) drying the wet formed body to form a dry formed body; and (S5) roasting the dry formed body, wherein the flammable material framework is burned off during the roasting step to form three-dimensional throughout channels. The preparation method is simple in operations. The three-dimensional throughout channels are formed in the sound absorbing material so that sound absorbing effect is improved. The sound absorbing material, which is prepared through the preparation method disclosed in the invention, has the three-dimensional throughout channels therein, so that the sound absorbing material is good in the sound absorbing effect. The filling method includes the steps of pre-fabricating the sound absorbing material and filling it into a to-be-filled space, so that the sound absorbing material is fully filled in the to-be-filled space.

A speaker system according to the present invention comprises a cabinet (10), a speaker unit (11), a first parting board (12), a drone cone (13), an adsorption member (14), a second parting board (15), a backboard (16), a variable mechanism (17), and a port (18). A sound pressure generated by the speaker unit (11) causes a pressure variation in a second chamber (R12) via the drone cone (13). The adsorption member (14) with an effect of physical adsorption is operable to suppress the pressure variation. Furthermore, by displacing the diaphragm (171), the variable mechanism (17) is operable to reduce a pressure variation of a direct current component, which is caused by variations in ambient temperature or atmospheric pressure of the speaker system.

The invention relates to a soundproofing window in which an intermediate film provides for damping of vibrations transmitted in particular by structure-borne conduction.

A soundproofing panel having a core sandwiched between a solid wall and a porous wall. The core being connected to the walls and having partitions extending in the thickness direction between the two walls so as to form cells. Each cell containing at least one sound energy dissipating layer constituted by hollow spherical beads having mutually contacting walls that are porous and micro-perforated, and being held in position in the thickness direction between the two walls by nets that are secured to the partitions.