12 results about "Reverberation room" patented technology

The present application relates to the technical field of microwave measurement and reverberation chamber, and particularly relates to a test model of total scattering cross section of a reverberation chamber stirrer based on mirror principle and application, comprising: constructing a mirror model, and obtaining the number of mirror objects after multiple reflections and the total surface area of the mirror model; obtaining the time constant of the reverberation chamber; obtaining the damping time constant of the stirrer; and constructing the test model of the total scattering cross section of the reverberation chamber stirrer. The present application directly reflects the propagation mechanism of electromagnetic waves in the reverberation chamber and the scattering characteristics of the stirrer on the electromagnetic waves, has a certain guiding effect on the optimization of the stirrer and the test configuration, helps to understand, analyze and reduce the un-stirred energy in the reverberation chamber, and finally realizes the effective improvement of the performance of the reverberation chamber.

The invention provides a translation door auxiliary device for a high-sound-intensity reverberation room, and the translation door auxiliary device comprises an air bag acting body which is arranged on the side wall, facing a second door body, of a first door body, the air bag acting body is of a convex structure with an inclined surface, and the inclination angle of the inclined surface of the air bag acting body is alpha 1; the air bag seat is arranged on the side wall, facing the first door body, of the second door body and is opposite to the air bag acting body in position, the air bag seat is provided with a concave structure matched with the air bag acting body, and an air bag mounting surface used for mounting an air bag is formed in the concave structure; and the air bag is arranged on the air bag mounting surface. The sliding door can keep stable and reliable sealing fit in the closed state.

The invention discloses a sound absorption material / structure noise reduction effect evaluation method and system, and belongs to the field of noise control and acoustic material testing. Aiming at the problems of high cost, strict site requirement and low efficiency of the existing reverberation room method and the problems of scene disjunction and weak spectrum reproduction capability of the impedance tube method, the method comprises the following steps of: extracting a steady-state background noise characteristic spectrum of a working site; building a sound absorption device and calibrating a corresponding relation between a signal and an intra-cavity sound pressure level; synthesizing driving signals with the same spectral characteristics; completely attaching the sample into the device, and reproducing an equivalent field sound field; acquired data is compared with sound pressure level and frequency spectrum difference, and the noise reduction effect is quantitatively evaluated. The method is low in cost and easy and convenient to operate, results are close to engineering practice, the noise reduction effects of multiple materials can be rapidly compared, and the method is suitable for sound absorption material research and development and model selection testing of small and medium-sized enterprises and common laboratories.

The invention discloses a variable reverberation acoustic laboratory structure, which comprises a laboratory body and an environment conversion mechanism, the laboratory body comprises a first body, an experiment space is formed in the first body and is used for carrying out an acoustic experiment, and the environment conversion mechanism is arranged in the experiment space and comprises a plurality of driving units and a plurality of conversion columns, at least one conversion column can be synchronously and rotatably installed on one driving unit, the peripheral side of each conversion column is provided with a sound absorption part and a reflection part arranged on the back face of the sound absorption part, each sound absorption part is made of a sound absorption material, each reflection part is made of a sound reflection material, and the conversion columns are arranged on the back face of the sound absorption part. Furthermore, when the plurality of conversion columns rotate by a preset angle through the driven unit, a semi-anechoic chamber sound field environment and a reverberation chamber sound field environment can be formed in the first body, so that the experiment requirements of different acoustic environments are met.

The utility model discloses a modular test cabin for elevator panel sound insulation performance detection, including receiving room modular sound insulation board: 450mm's modular sound insulation board, sound reduction cabin accessory: sound reduction cabin accessory is according to different demand installation integrated equipment, receiving room frame: receiving room frame is the main load square steel frame fixed through the angle code connection, reverberation chamber modular sound insulation board: the reverberation chamber modular sound insulation board surrounds 63mm thickness's modular sound insulation board, flanging opening, and self -drilling screw is fixed through flanging hole and square steel frame connection, and two pieces of opposite buckle are installed, sound source room frame: sound source room frame is the main load square steel frame connected through the angle code, and test performance accessory: integrated temperature and humidity sensor, monitoring, sound source can detect the accessory of influence test performance, and test system: 8 channel high accuracy data acquisition system and MFF12 microphone. This test cabin system can be spliced through reverberation cabin and silence cabin to create the test environment of measuring elevator wallboard acoustic performance.

The application discloses an electric intelligent control system for a soundproof door of an acoustic reverberation chamber, which comprises a control cabinet, a door driving mechanism, a cover plate driving mechanism, a sealing air bag control mechanism, a sensing detection mechanism and an electrical connection mechanism. The application realizes full-automatic intelligent control of the opening and closing, sealing and safety detection of the soundproof door through PLC centralized control and multi-stage sensing feedback, significantly improves the use efficiency and sound insulation performance of the reverberation chamber, reduces manual operation errors, has the advantages of reasonable structure, rapid response, high control precision and convenient maintenance, and can greatly improve the automation and reliability level of environment control of an acoustic test chamber.

The invention provides a soundproof door for a high-sound-intensity reverberation room. The soundproof door comprises an inward opening door and an outward opening door which are oppositely arranged. The inward opening door further comprises a frame installed in a reverberation room wall door opening; the door leaf comprises an outer plate, a damping material layer, a silica gel aluminum blanket laying layer, a concrete layer, a silica gel aluminum blanket laying layer, a thick damping material and an inner plate which are sequentially arranged in a stacked mode. The soundproof door provided by the invention not only can realize a higher sound insulation factor, but also has excellent structural strength and lower total weight, and is suitable for test environments with extreme sound pressure level requirements, such as a high-sound-intensity reverberation room and the like.

Test device (1) for the functional testing, in particular in accordance with standards and / or standardization, of an acoustic signal generator (2), in particular an acoustic signal generator (2) of a fire alarm system, in particular for conformity testing in accordance with the requirements of and / or in accordance with DIN EN 54-3, in particular by measuring and / or evaluating a sound pressure level of an acoustic signal (warning signal) generated by the acoustic signal generator (2), wherein the test device (1) comprises: - a reverberation chamber (3), in particular a box-shaped reverberation chamber, in particular wherein the reverberation chamber (3) comprises a plurality of chamber walls (4), in particular six chamber walls (4), and / or is composed of a plurality of chamber walls (4), in particular six chamber walls (4), preferably wherein the reverberation chamber (3) is bounded and / or formed by the chamber walls (4), - a device arranged in the reverberation chamber (3),preferably pivotably and / or rotatably mounted and / or attached, microphone (5) for detecting and / or recording an acoustic signal (warning signal) generated by the acoustic signal generator (2), in particular for detecting and / or recording a sound pressure level of an acoustic signal (warning signal) generated by the acoustic signal generator (2), in particular wherein the microphone (5) is arranged and / or attached and / or mounted on a chamber wall (4) of the reverberation chamber (3) by means of a microphone holding device (6), in particular pivotably and / or rotatably, - a test specimen holder (7) arranged in the reverberation chamber (3) for holding and / or receiving an acoustic signal generator (test specimen) (2) to be tested, in particular wherein the test specimen holder (7) is attached to a chamber wall (4), preferably to a chamber wall (4) opposite the microphone (5),preferably arranged and / or attached to one of the chamber walls (4) opposite the microphone holding device (6) for the microphone (5); wherein at least one ventilation opening (8A, 8B), preferably a perforation, is arranged and / or provided on and / or in at least one chamber wall (4), in particular for the preferably defined and / or predetermined inlet and / or outlet of air, preferably test atmosphere, into and / or out of the reverberation chamber (3) and / or in particular for the preferably defined and / or predetermined setting of environmental stress conditions in the reverberation chamber (3).

The invention discloses a high-sound-insulation electric door system for a large reverberation room, and aims to provide a technical scheme for effectively solving the problems that a traditional electric door system is poor in sound insulation, unstable in door body, difficult to open and the like in a high-sound-intensity environment. The high-sound-insulation electrically operated gate system comprises a gate body assembly, a driving assembly, a sealing assembly, a cover plate assembly, a guiding assembly and the like, the functions of efficient sound insulation, overturning resistance and passage opening can be achieved in a high-sound-intensity test, and the test accuracy of a reverberation chamber and the stability of an experimental environment are greatly improved. The system can meet the strict requirements of a large reverberation room under the extreme audio test condition, the high sound insulation performance of the door body in the closed state is ensured through the special material and structural design, the sound insulation effect can be further improved through the air bag sealing system, and meanwhile stable opening and closing and long-term use stability of the door body are ensured.

The utility model belongs to the technical field of metal sound barriers, and particularly relates to a novel inserting plate type metal sound barrier unit plate. The metal sound barrier unit plate comprises a cavity formed by a face plate, a back plate and edge beams, a sound absorber is installed in the cavity, the sound absorber is composed of a honeycomb structure block and a viscoelastic fluid filling layer arranged in the honeycomb structure block or the sound absorber is composed of a rock wool core layer and a sound transmission plate clamping the rock wool core layer, irregular cavity gaps are distributed in the sound transmission plate, and the irregular cavity gaps are distributed in the cavity. In the cavity, a front reverberation chamber is formed between the sound absorber and the panel, and a rear reverberation chamber is formed between the sound absorber and the back plate; the metal sound barrier unit plate is provided with a composite sound absorption system and has the advantages of being long-acting and stable in sound absorption and noise reduction, firm in structure, economical and durable.

The invention provides a composite soundproof door for a high-sound-intensity reverberation room, which comprises a door body, and the door body comprises an outer plate, a first concrete layer, a first partition plate, a sound absorption material layer, a second partition plate, a second concrete layer and an inner plate which are sequentially stacked in the thickness direction of the door body; wherein the outer plate is arranged towards the outside of the high-sound-intensity reverberation chamber in the assembling state, and the inner plate is arranged towards the inside of the high-sound-intensity reverberation chamber in the assembling state. The soundproof door provided by the invention not only can realize a higher sound insulation factor, but also has excellent structural strength and lower total weight, and is suitable for test environments with extreme sound pressure level requirements, such as a high-sound-intensity reverberation room and the like.

The invention provides a sound insulation sealing structure which comprises an embedded assembly arranged on the peripheral wall face of a reverberation room door body and used for forming an assembly groove in the periphery of the reverberation room door body. The embedded assembly further comprises an inflation and deflation pipeline, and the inflation and deflation pipeline communicates with an external air source and is configured to provide an inflation and deflation channel. The air bag mounting base is arranged in the assembling groove and fixedly connected with the assembling groove, a containing groove is formed in the inner side of the air bag mounting base, and a ventilation structure communicated with the inflation and deflation pipeline is arranged in the containing groove; the at least one sealing air bag is arranged in the containing groove, and each sealing air bag is provided with at least two clamping bosses; and the pressing block assembly is fixedly connected with the air bag mounting base, presses the clamping boss and is configured to limit the displacement of the sealing air bag in the air bag mounting base.