7 results about "Acoustic design" patented technology

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 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.

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 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.

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.