SU917194A1 - Device for evaluating sound-insulating properties of structures - Google Patents

Description

(54) DEVICE FOR THE SOUND-ISOLATING PROPERTIES

CONSTRUCTIONS

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The invention relates to the field of measurement of sound vibrations, in particular for evaluating the sound insulation properties of structures.

A device for estimating the sound properties of cabs, consisting of an oscillation sensor connected to a noise meter, is known. The vibration sensor is located inside the vehicle cabin, which is mounted directly on the real machine t1.

The disadvantage of such a device and research method is the need to start the engine when performing measurements. This, in order to assess the sound insulation properties of different ka & ha, they must be alternately mounted on the chassis of a real machine, which is concomitant, with significant economic costs.

A device for sound evaluation is known. The construction properties of the structures include a portable radiating chamber with a radiator mounted on the surface of the structure under study, and a registering device installed on the opposite side of the structure and attached to the indicator. The emitter is connected to the source of the noise signal 12.

A disadvantage of the known device is the impossibility of carrying out tests of volumetric constructions limited in space by several walls. In addition, using such a device, it is possible to evaluate the sound insulation properties of only a certain part of the structure. AT

10 real conditions, the same construction can have different sound insulation properties in its various places, which will introduce significant errors in the evaluation results.

The purpose of the invention is to increase the reliability of the result of the evaluation of the soundproofing properties of structures and to ensure the possibility of testing bulk constructions.

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Claims (2)

The goal is achieved by the fact that a device for evaluating the soundproofing properties of structures from airborne noise, containing a noise emitter, located outside the structure, and an oscillation sensor, located inside it and connected to the first input of a noise meter, have additional noise emitters, a storage unit and sensors oscillation, with the latter being connected to the inputs of the noise meter and located on the anesthetical side of the structure between it and the corresponding additional radiators, noise, connected bubbled with access memory unit having an input connected to the output of the noise meter. The drawing shows the functional diagram of the device. The device consists of a noise meter 1, the first input of which is connected to a sensor 2 oscillations installed inside the structure under study and the remaining inputs of the meter 1 are connected to the control sensors 3-b vibrations, located on the outside of the structure under study 7, between each of its walls and corresponding This is done with 8-11 noise transmitters. The sequence is subalued to the output of the closing unit 12, the input of which is connected to the output of the Noise meter 1. The device works as follows. Preliminarily, the noise meter 1 is controlled by a sensor; 11 sensors, which can serve as 3–6 microphones, connected with g (I1glshgelsh 1 input of the meter 1 sycamore), measure the pressure sprout pressure in compression bands at standardized frequencies from 63 to ŠЮ Hz under study design, 1S1 {N {me, ka & shy 7 vehicle em effects real life noise, which existed during expulsion. Zgomina ECDy block 12, which could be heard, for example, magshpofon fixes) stenokhnyh pressuredry {, recording them from the output meter 1 wow Then the real source of shu is disconnected by means of remembering the 12th sequence on every octave, and all the participants will be examined by the ENTOR, he knew the 1 st sound of the real real world. We are waiting for Caiyash on the two-sided pressure, twist-on-each pressure on each wall, change the distance a, b, c and d between the 3-6 and microphones and match the 8-11 emitters. noise 9 4 Measuring the soundproofing properties of the cabin is carried out by measuring 1 of noise using an oscillation sensor, a microphone 2 installed inside the cabin. 7 and connected by the first input of the noise meter 1. By alternately switching on additional tones, it is possible to explore the sound & the insulating properties of each wall of the structure, which allows one to choose the best option for each wall. With simultaneous inclusion of all additional functions, the evaluation of the sound insulation properties of the co1 | in general. Thanks to our sensors, sensors, and; to conduct both in the room and in the closed air. The presentation of the proposed device allows to significantly reduce the cost of EFFICIENCY MEASURING the sound-insulating properties of the square and to choose the best price from the air noise of the source and can find it. and companies producing transport agents. The invention The device for assessing the soundproofing properties of structures from airborne noise, comprising an internal sensor, located with a) parking} {above, 1 construction, and a coil sensor% {pa raspolozhennye her and connected with the first input measured myMz, about this and that, in order to identify the reliability of the evaluation result, additional devices were inserted into the device, a block and a vibration sensor were memorized, with each other connected. The rest of the entrance of the noise room and of the horn from the external structure of the structure between it and the corresponding noise emitters connected to the output of the fuse of the unit, the input of which is connected to the output of the melancholy bodies. Sources of information1Mation, taken into account during the examination 1.Mashuvl agricultural self-propelled. GOST 16529-70. Methods for the determination of vibration and noise. characteristics. M., Standards Publishing House, 1971. 2. USSR author's certificate number 466536, cl. G 10 K 11/00, 30.06.72 (prototype). one 5i Z fV) er n L.:L.J "I L.