22 results about "Acoustic design" patented technology

The invention relates to the technical field of acoustic metamaterial structures, in particular to a high-bearing coupling stepped Helmholtz cavity honeycomb sound absorption structure which comprises a plurality of honeycomb structures arranged periodically. A top micro-perforated hole is formed in the center of the top surface of the honeycomb structure, a vertical sound channel is formed in the center of the interior of the honeycomb structure, and a plurality of Helmholtz resonant cavities are formed in the periphery of the interior of the honeycomb structure; the vertical sound channel is communicated with the micro-perforated structure, and the heights of the Helmholtz resonant cavities are distributed according to an arithmetic progression; and the vertical sound channel is communicated with the Helmholtz resonant cavity through a resonant cavity micro-perforated hole. Through collaborative innovation of acoustic topological optimization and mechanical bearing design, the technical paradox that low frequency needs a thick layer and light weight is difficult to bear load of a traditional sound absorption material is broken through, and an innovative solution is provided for cabin acoustic design of aerospace, high-speed rails and other high-end equipment.

Provided is an ultrasound probe in which even in a case where the number of channels of a piezoelectric element is increased, reliability is not impaired and it is not necessary to change acoustic design.An ultrasound probe includes: a flexible circuit board disposed between the backing material and the plurality of piezoelectric elements, in which each of the plurality of piezoelectric elements consisting of a laminate in which a signal electrode layer, a piezoelectric body portion, and a ground electrode layer are sequentially laminated in a lamination direction on a surface of the flexible circuit board, the signal electrode layer is electrically connected to the flexible circuit board, the flexible circuit board is longer than the piezoelectric body portion in an elevation direction, first members consisting of an adhesive in which abrasive grains are dispersed are disposed at end parts of the laminate in the elevation direction, and the ground electrode layer is electrically connected to the flexible circuit board via metal foil that extends from a surface of the laminate to surfaces of the first members and side surfaces of the first members in the elevation direction.

A method for optimizing acoustic performance in listening spaces addresses limitations in room acoustics for music production and reproduction. The method comprises two optimization steps: a multi-objective room optimization method applicable to any room shape and a multi-objective treatment optimization method that iteratively searches a library of potential acoustical treatments to determine optimal solutions for each accessible area. The method utilizes a multi-objective search engine to simultaneously optimize several critical acoustic metrics, including low-frequency response, spatial variation around listening positions, early reflections, modal temporal decay, and mid-to-high-frequency reverberation time. The integration of both optimization methods provides comprehensive acoustic control across the entire audible spectrum.

In an active noise control method and system for a vehicle, the active noise control method for a vehicle includes receiving, by a head unit, a noise signal detected by at least one wireless earphone in a vehicle, generating, by an amplifier (AMP) controller, a target output signal corresponding to a sound to be provided to an occupant, generating, by an acoustic design processor (ADP) controller operatively connected to the amplifier (AMP) controller, an opposite phase signal to a signal made by subtracting the target output signal from the noise signal, and transmitting, by the head unit, the generated opposite phase signal to the at least one wireless earphone.

The application discloses a floor heating simulation design method and device, equipment and a storage medium. The method comprises the following steps: obtaining building design house type data; obtaining a house type geometric model of the building design house type decoration material arrangement according to the building design house type data; obtaining an indoor acoustic simulation space model of a set building house type according to the house type geometric model of the building design house type decoration material arrangement and setting position information of a sound source device in the house type geometric model; obtaining an indoor acoustic simulation space grid model and a field distribution of an indoor acoustic design variable according to the indoor acoustic simulation space model of the set building house type and grid division of the indoor acoustic simulation space model. The application can understand whether the current indoor design can fully meet the sound insulation demand by obtaining the required house type for design and simulation, so as to adjust the use and layout of the sound insulation material and create a comfortable acoustic environment.

The utility model belongs to the technical field of headphones, and particularly relates to a lightweight frame structure of a planar magnetic structure headphone and the headphone. The frame structure, except for the acoustic design and part matching necessary structure, of the frame rear shell is arranged to be the concave hollowed-out structure, the weight of the frame rear shell can be reduced, and the hollowed-out design of the frame structure except for the acoustic design and part matching necessary structure does not affect the structural functions of the acoustic design and part matching necessary structure. The fixing strips on the front shell of the frame are set to be semi-arc-shaped, so that the diffraction phenomenon generated when the sound passes through is reduced, and the definition and the accuracy of the sound quality are improved. Therefore, the sound quality definition and accuracy of the earphone can be improved while the weight of the earphone is reduced.

The present invention discloses an acoustic design method applicable to a fan with a small hub ratio, which relates to the field of fan acoustic design and includes: determining the diameter D of the fan; specifying the initial volume V of the expansion slot at the fan outlet; calculating to obtain the specific frequency f of the expansion slot k ; determining the maximum rotational speed N of the fan; determining the first-order blade passing frequency f2 of the fan; judging whether f k is equal to f2. If so, obtaining the designed volume of the expansion slot based on the initial volume V of the expansion slot; if not, adjusting the initial volume V of the expansion slot to the target volume V1 of the expansion slot such that f k = f2, and obtaining the designed volume of the expansion slot based on the target volume V1 of the expansion slot; completing the acoustic design of the fan based on the maximum rotational speed N of the fan, the number B of rotor blades of the fan, and the designed volume of the expansion slot; the present invention can solve the problems of insufficient low-frequency suppression, delayed high-frequency cancellation, and lack of multi-physical field coupling design of traditional noise reduction technologies for fans with small hub ratios.

To provide a supersonic probe in which reliability is not damaged and change of an acoustic design is not needed, even if the number of channels of a piezoelectric element is increased.SOLUTION: A supersonic probe is constituted in such a manner that: a flexible circuit board (2) is disposed between a backing material (1) and a plurality of piezoelectric elements (4); each of the plurality of piezoelectric element (4) is formed of a laminate (L) in which a signal electrode layer (4A), a piezoelectric material (4B) and a ground electrode layer (4C) are sequentially laminated in a lamination direction; the signal electrode layer is electrically connected to the flexible circuit board; and in an elevation direction (D2), the flexible circuit board is longer than the piezoelectric material. On an end of the laminate in the elevation direction, a first member (5) formed of an adhesive in which abrasive grains are dispersed, is disposed. The ground electrode layer is electrically connected to the flexible circuit board through a metal foil (6) extending from the surface of the laminate to the surface of the first member and along the side surface of the first member.SELECTED DRAWING: Figure 2

Provided is an ultrasonic probe in which reliability is not impaired even when the number of channels of a piezoelectric element is increased, and in which an acoustic design does not need to be changed. A flexible circuit board (2) is disposed between a backing material (1) and a plurality of piezoelectric elements (4), each of the plurality of piezoelectric elements (4) is configured from a laminate (L) in which a signal electrode layer (4A), a piezoelectric body part (4B), and a ground electrode layer (4C) are laminated in this order in the lamination direction, the signal electrode layer is electrically connected to the flexible circuit board, the flexible circuit board is longer than the piezoelectric body part in the elevation direction (D2), and the ground electrode layer is electrically connected to the piezoelectric body part in the elevation direction (D2). A first member (5) comprising an adhesive in which abrasive grains are dispersed is disposed at the end of the laminate in the elevation direction, and the ground electrode layer is electrically connected to the flexible circuit board via a metal foil (6) extending from the surface of the laminate along the surface and side surfaces of the first member.

Motor vehicle (10) comprising at least one actuating device (14) designed and configured to move at least one actuator of at least one electronically controllable component (13), wherein the motor vehicle (10) comprises at least one active noise suppression device (16) – a so-called ANC – designed and configured to suppress noise of the component (13) when moving (11); and wherein the motor vehicle (10) comprises at least one active sound generation device (23) – a so-called ASS – designed and configured to generate noise when moving (11) the component.

The invention discloses a ship sound stealth expert model construction method based on a knowledge graph, and the method comprises the following steps: data extraction: collecting and preprocessing data from various determined heterogeneous sources, converting a processing format, cleaning initial data, and preparing data for subsequent knowledge extraction; knowledge graph construction: taking the preprocessed data as input, and coordinating and creating a sound stealth knowledge graph; and retrieval enhancement generation: providing a user-friendly environment for the expert user based on LLM and GraphRAG to interact with the expert model. The invention discloses a ship sound stealth expert model construction device based on a knowledge graph. The method realizes the vertical field question-answering effect of the ship acoustic stealth specialty, provides professional question-answering service and friendly interaction service for the user, and can be widely applied to the technical field of top acoustic design.

In an active noise control method and system for a vehicle, the active noise control method for the vehicle includes receiving, by a head unit, a noise signal detected by at least one wireless headset in the vehicle, generating, by an amplifier (AMP) controller, a target output signal corresponding to a sound to be provided to a passenger, generating, by an acoustic design processor (ADP) controller operably connected to an amplifier (AMP) controller, a phase signal opposite to a signal obtained by subtracting the target output signal from the noise signal, and transmitting, by the head unit, the generated opposite phase signal to the at least one wireless headset.

The invention discloses an acoustic design method suitable for a small-hub-ratio fan, and relates to the field of fan acoustic design, comprising the following steps: determining the diameter D of the fan; giving the initial volume V of the expansion groove of the fan outlet; calculating to obtain the specific frequency fk of the expansion groove; determining the highest rotating speed N of the fan; the first-order blade passing frequency f2 of the fan is determined; whether fk is equal to f2 or not is judged, and if yes, the design volume of the expansion groove is obtained based on the initial volume V of the expansion groove; if not, the initial volume V of the expansion groove is adjusted to be the target volume V1 of the expansion groove, so that fk is equal to f2, and the design volume of the expansion groove is obtained based on the target volume V1 of the expansion groove; based on the highest rotating speed N of the fan, the number B of rotor blades of the fan and the design volume of the expansion groove, acoustic design of the fan is completed; according to the invention, the problems of insufficient low-frequency suppression, high-frequency offset delay and lack of multi-physics coupling design in the traditional noise reduction technology can be solved for the small-hub-ratio fan.

This invention belongs to the field of noise control and acoustic design of rail transit vehicles, and discloses a forward design method for low-noise interior of a power-centralized EMU combined with sound quality optimization. The steps are as follows: First, determine the design target value for the in-vehicle noise sound pressure level and the target value for the comprehensive annoyance index of sound quality. Second, based on the whole-vehicle noise simulation model, allocate noise limits from the perspective of sound source-transmission path combinations, and verify the rationality of the allocation results in conjunction with engineering feasibility requirements. Third, establish independent simulation models for different sound source-transmission path combinations, determine initial optimization design parameters, and input them into the whole-vehicle noise simulation model for iterative optimization to ensure that the total A-weighted sound pressure level in the passenger compartment reaches the design target. After the sound pressure level meets the target, obtain the comprehensive annoyance index of sound quality using a sound quality evaluation and prediction model. When the sound quality does not meet the target, locate the psychoacoustic parameters affecting the sound quality and the corresponding sound source-transmission path combinations, and perform secondary optimization until the sound quality meets the target.

The invention relates to the technical field of acoustic design of photovoltaic power generation, and discloses a modular sound absorption and heat dissipation structure for a photovoltaic panel and the photovoltaic panel. A plurality of modular sound absorption and heat dissipation structures are spliced into a back plate of the photovoltaic panel, each modular sound absorption and heat dissipation structure comprises a rectangular groove, a micro-perforated plate and a mixed film resonator, the micro-perforated plate covers a notch of the rectangular groove and is used for absorbing part of noise penetrating through the micro-perforated plate, and the mixed film resonator is suspended in the rectangular groove and is used for absorbing the noise penetrating through the micro-perforated plate. The energy converter is used for converting energy of noise penetrating through the micro-perforated plate into vibration so as to drive air in the rectangular groove to circulate; the photovoltaic panel comprises a back plate and a plurality of solar cells, the back plate comprises a plurality of modularized sound absorption and heat dissipation structures in any embodiment, the modularized sound absorption and heat dissipation structures are spliced together, and the solar cells are laid on the back plate.

The invention discloses a pneumatic and acoustic integrated design method of a variable chord length multi-section airfoil profile based on an agent model, which comprises the following steps of: dividing a sample space into a geometric parameter set and a position parameter set according to a selectable configuration, constructing a design space through a global random sampling or self-adaptive sampling method, obtaining flow data of a corresponding sample, and calculating the flow data of the corresponding sample according to the flow data; and introducing a physical shape constraint and an engineering target constraint, training an agent model of a comprehensive target comprising pneumatic and acoustic indexes, obtaining an optimal design parameter derived from the current model based on global optimization, and verifying and evaluating a performance parameter of an optimal sample. According to the self-adaptive sampling method disclosed by the invention, geometric interference of samples is reduced, and the sampling stability is enhanced; multiple flow field data are utilized to optimize target composition richness, lift resistance, pressure, average speed, broadband noise, far-field noise and the like, and engineering experience constraints are introduced to reasonably adjust the optimization process, so that the optimization result has higher engineering feasibility and application value.

This utility model relates to a cavity-based anti-leakage structure for a loudspeaker cable passage, comprising a loudspeaker driver, a panel, and a rear shell. The loudspeaker driver is disposed inside the panel. The panel also has a cavity, through which the connecting wire of the loudspeaker driver passes. A circular hole is provided on the rear shell corresponding to the cavity. The rear shell and panel are ultrasonically sealed after the circular hole aligns with the cavity, and the circular hole contains sealing adhesive. This utility model uses ultrasonic welding to completely eliminate the risk of air leakage at the joint surface of the partition; external adhesive injection directly seals the wire perforation, eliminating the air leakage channel; and the adhesive injection location is exposed, allowing direct visual inspection of the adhesive filling state, avoiding hidden defects; at the same time, precise external adhesive injection significantly reduces the amount of adhesive used, eliminating the internal adhesive application process and simplifying the assembly process; thus significantly improving the airtightness of the cavity, ensuring that low-frequency response and distortion control meet acoustic design requirements.

The utility model relates to the technical field of architectural acoustic design, and discloses a sound-absorbing suspended ceiling board, which is characterized in that a plurality of sound-absorbing holes are arrayed on a first sound-absorbing board and used for concentrating sound waves, so that the absorption of low-frequency noise and high-frequency noise is facilitated; sound waves penetrate through the sound absorption holes, are absorbed by the sound absorption cotton and then pass through the third sound absorption plate, and the third sound absorption plate continuously absorbs low-frequency and high-frequency sound waves (the sound waves penetrate through the sound absorption cotton, are reflected at through holes in the bottom wall of the third sound absorption plate and are absorbed again, so that the sound wave absorption effect is improved); part of the sound waves are continuously absorbed by the second sound absorption plate after penetrating through the third sound absorption plate; through multiple times of absorption, low-frequency and high-frequency sound wave energy is absorbed and dissipated layer by layer, the problem that a traditional sound absorption board cannot be dissipated and absorbed due to too large sound wave energy in the using process is effectively solved, indoor noise reflection and propagation are reduced as much as possible, the good sound absorption effect is achieved, and the definition and the tone quality of music are improved.

This invention relates to the field of architectural acoustics and discloses a 3D-printed porous, hollowed-out sound-absorbing material, including extruded materials, linear materials, granular materials, powder-layer nozzle 3D-printed materials, laminated materials, and photopolymerized materials. Extruded materials mainly include thermoplastics, eutectic metals, and edible materials; linear materials include stainless steel and aluminum alloys; powder-layer nozzle 3D-printed materials include gypsum; laminated materials include paper, metal films, and plastic films; and photopolymerized materials include photocurable resins. This invention allows for the selection of different materials and processing models according to customer needs and acoustic design schemes, producing sound-absorbing materials with different properties and acoustic parameters, thereby meeting various acoustic requirements and solving various acoustic problems.

The invention relates to a device and a method for measuring and acquiring unsteady exciting force of a propeller, which are mainly used for acquiring unsteady exciting force of propellers such as an underwater platform or a submersible vehicle and can provide excitation source input data support for calculation and analysis of radiation noise of the underwater platform and guide acoustic design of the platform. According to the technical scheme, the device is integrally arranged in a shell, the shell is arranged in a circulating water tank to simulate the incoming flow condition, and elastic connection is additionally arranged to simulate the free state of a ship in water; on the basis, a power source and a transmission structure in the shell drive a propeller located outside the shell, a force measuring balance is connected to a main shaft, close to the propeller, in the shell, and a measuring result is obtained. The device has the advantages that no support exists between the additionally-arranged force measuring balance and the propeller, interference is reduced, and then accurate unsteady exciting force of the propeller is obtained.

The invention relates to the technical field of air pump all-in-one machines, and discloses an anti-vibration and noise-reduction air pump emergency starting power source all-in-one machine which comprises an air pump all-in-one machine body, the air pump all-in-one machine body comprises a protection unit, a noise reduction air pump unit is arranged in the protection unit, and a portable unit is arranged outside the protection unit. According to the air pump emergency starting power supply all-in-one machine capable of resisting vibration and reducing noise, through a first spring, a second spring and the like of a composite structure of vertical spring buffering and transverse hinged spring vibration reduction and in combination with the acoustic design of a silencer, vibration and noise are effectively reduced, and the stability and comfort of equipment are improved; the protection unit integrates the functions of power supply, control, storage and protection, the number of parts is reduced, the size is reduced, durability and multifunctionality are both considered, the portable unit enables the air pipe to have the functions of an inflation pipeline and a handle, 'plug-and-play 'fast conversion is achieved, the problem of air pipe winding is solved, and the use efficiency and portability are improved.

A device, a vehicle (10) for acoustic design of a vehicle (10) and a method for acoustic design of a vehicle (10) are proposed. The method comprises the steps of: determining a user input for selecting and associating an acoustic sound marker (11) with a guided mechanical element of the vehicle (10); an interaction of a user (12) with the mechanical element is determined by sensor technology and a sound marker is played in response thereto during manipulation of the element.