54 results about "Acoustic design" patented technology

In an acoustic design support apparatus, a speaker selection supporter selects a desired speaker as a candidate for use in a given space based on shape information representing a shape of the space. A speaker mounting angle optimizer calculates an optimal mounting direction of the selected speaker by selecting a mounting direction pattern which minimizes a degree of variation among sound pressure levels at a plurality of positions on a sound receiving surface defined in the space. An acoustic parameter calculator calculates a variety of acoustic parameters at sound receiving points within the space based on both of the shape information of the space and the optimal mounting direction of the speaker.

A road sound insulation barrier is composed of a main structural component, sound absorption plates and a sound insulation reinforcement structure. The main structural component is formed by reinforced concrete bases, structural columns, force bearing beams and concave tension beams, the sound absorption plates are arranged in the direction close to a noise source, the sound insulation reinforcement structure is formed by sound insulation plates and square insulation plate shape stiffening ribs and is arranged in the direction opposite to the noise source, and flexible anti-crack mortar is used as adhesives and filling agents. The structural columns, the force bearing beams and the concave tension beams are all prefabricated by reinforced concrete. The road sound insulation barrier has the advantages of being wide in material sources and low in manufacturing cost, and meanwhile accords with acoustic design standards, the use requirement for the sound insulation barrier is met, maintenance cost is low, and the service life is long.

In an acoustic design support apparatus, a speaker selection supporter selects a desired speaker as a candidate for use in a given space based on shape information representing a shape of the space. A speaker mounting angle optimizer calculates an optimal mounting direction of the selected speaker by selecting a mounting direction pattern which minimizes a degree of variation among sound pressure levels at a plurality of positions on a sound receiving surface defined in the space. An acoustic parameter calculator calculates a variety of acoustic parameters at sound receiving points within the space based on both of the shape information of the space and the optimal mounting direction of the speaker.

The invention belongs to the technical field of acoustic treatment and particularly provides a modular coupling structure with sound insulation, sound absorption and sound diffusion functions. The modular coupling structure comprises a frame with an upper opening and a lower opening. A punched sound absorption material plate, a punched flame-retardant plate, a porous sound absorption material plate I, a gypsum board, a porous sound absorption material plate II, a wood material plate and an aluminous gusset plate are sequentially mounted in the frame from top to bottom. According to the modularcoupling structure with the sound insulation, sound absorption and sound diffusion functions, the modes of small-room professional acoustic design and building acoustic treatment can be changed, traditional decoration links are directly omitted under the condition of conforming to the relevant national standards and regulations, and harmful gas generated during traditional decoration is avoided.

The invention relates to a one-time forming method for an automobile carpet sound insulation pad and belongs to the technical field of automobile interior trim parts. The manner that a felt sound insulation pad (PET felt) is arranged at the lower portion and a face carpet is arranged at the upper portion (PET and a PE adhesive film are compounded) is mainly adopted, and the product of an automobile carpet is manufactured through felt forming, cooling sizing, soft and hard layer water jet cutter cutting, EPP embedding assembling, face carpet attaching, assembly water jet cutter cutting, accessory installing and checking boxing. By means of the method, technological processes are simple, the input of the production link and the input of tools are reduced, the labor cost is reduced, the problems that a carpet manufactured through a traditional technology is poor in VOC and high in weight are solved, the design requirement for the overall small weight is met, the overall VOC performance isimproved, no harmful substance is generated in the production process, and the automobile carpet sound insulation pad belongs to an environment-friendly product. By means of the one-time forming method, the indexes that the carpet is small in weight and good in VOC performance are achieved, noise in an automobile body is effectively lowered, the overall acoustic design requirement is met, and theinternational leading edge level is achieved.

The invention, which relates to the acoustic field of the room, discloses a pulse-response-based room sound propagation path separation method. According to the technical scheme, the method comprises: measurement is carried out to obtain a pulse response in a room; after the time-domain windowing cut-off operation and frequency-domain filter processing are executed on the pulse response, division of pulse response energy of the obtained part and total pulse response energy is carried out to obtain ratio values of acoustic energy of designated transmission paths to total acoustic energy; and then contributions of all acoustic propagation paths to a total sound pressure level in the room are separated and thus quantitative results of language privacy influences by all paths are obtained. With the method, the obtained acoustic propagation path separation result of the room can be used for an acoustic design of a newly open office or acoustic modification of an existing open office. The method has the following advantages: the universal and simple performances are good; the method is suitable for any room; no complicated theoretic modeling process is required; the method is easy to operate; and the result is reliable.

The invention discloses a composite structure acoustic design method based on the temperature-variable frequency-variable characteristic of a damping material, and the method comprises the steps: determining a damping loss factor and an elastic modulus of a viscous-elastic material along with the temperature and frequency changes, and building a composite structure acoustic model considering the temperature-variable frequency-variable characteristic of the damping material; therefore, the effect of the viscous-elastic material in practical application can be simulated more accurately, and scientific support is provided for vibration and noise reduction optimization design application of a composite structure.

An electro-optical device with a sound generating body is disclosed, in which an electro-optical device and a sound generating body can be mounted compactly and which can eliminate necessity of acoustic design of the sound generating body for an enclosure of an electronic apparatus for accommodating the electro-optical device. The electro-optical device of the present invention includes a first frame, a second frame opposed to the first frame, a third frame interposed between the first frame and the second frame, an electro-optical panel supported by the first frame, and a sound generating body supported by the second frame and covered by the second frame and the third frame, the sound generating body being arranged so as to be two-dimensionally overlapped the electro-optical panel.

The invention discloses a receiver, which comprises a single body of the receiver and a sound conduit, wherein the diaphragm, the frame and the support of the single body of the receiver constitute the internal cavity of the receiver; the sound conduit is arranged on the body of the single body of the receiver The back includes a sealed end and an open end, the sealed end is communicated with the internal cavity of the receiver through the inner opening of the frame, and the open end is provided with a through hole communicated with the outside. The technical solution of the present invention can make full use of the space on the back of the main body of the receiver, reduce the increase in the volume of the receiver, make the structural size of the receiver meet the needs of use, effectively reduce the resonant frequency of the receiver itself, improve the low-frequency performance of the receiver, and further improve The low-frequency performance of the earphone reduces the limitation of the earphone acoustic design on the appearance design.