KR20040110136A - Noise Shielding performance testing device - Google Patents

Noise Shielding performance testing device Download PDF

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Publication number
KR20040110136A
KR20040110136A KR1020030039317A KR20030039317A KR20040110136A KR 20040110136 A KR20040110136 A KR 20040110136A KR 1020030039317 A KR1020030039317 A KR 1020030039317A KR 20030039317 A KR20030039317 A KR 20030039317A KR 20040110136 A KR20040110136 A KR 20040110136A
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South Korea
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noise
chamber
sound
insulation performance
sound insulation
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KR1020030039317A
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Korean (ko)
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신재성
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현대자동차주식회사
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Priority to KR1020030039317A priority Critical patent/KR20040110136A/en
Publication of KR20040110136A publication Critical patent/KR20040110136A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: A noise shielding performance measuring device is provided to measure the performance of a sound absorbing member in a state in which an air-borne noise is mixed with a structure-borne noise. CONSTITUTION: A noise shielding performance measuring device includes a speaker, a vibrator, an excitation chamber(100), a sound chamber(200), and a frame(300). The speaker(140) generates an air-borne noise. The vibrator(120) generates a structure-borne noise. The excitation chamber(100) includes the speaker(140) and the vibrator(120). The sound chamber(200) is installed on the excitation chamber. The sound chamber(200) has a microphone therein. The frame is installed between the excitation chamber(100) and the sound chamber(200) and is used for fixing a sound absorbing member thereto.

Description

차음성능 측정장치{Noise Shielding performance testing device}Noise shielding performance testing device

본 발명은 차량에 적용되는 흡차음부재의 차음성능 측정장치에 관한 것으로, 특히 에어본노이즈(Air-borne noise)와 스트럭쳐본노이즈(Structure-borne noise)가 혼재하는 형태의 소음하에서의 차음성능을 측정하기 위한 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation performance measuring apparatus of a sound absorbing and insulating member applied to a vehicle. In particular, the sound insulation performance under noise of a form in which air-borne noise and structure-borne noise are mixed is measured. It relates to a device for.

실제의 차량에서 발생하는 소음은 차체의 진동에 의한 스트럭쳐본노이즈와 공기중으로 전파되는 에어본노이즈가 복합적으로 작용한다.The actual noise generated by the vehicle is a combination of the structure bone noise caused by the vibration of the vehicle body and the air bone noise propagated into the air.

그런데, 종래의 흡차음부재에 대한 성능시험은 스피커를 이용해서 스피커가진(speaker excitation)을 통한 에어본노이즈에 대한 평가가 주를 이루고 있으며, 스트럭쳐본노이즈에 대한 평가도 이루어지고 있기는 하지만 에어본노이즈와 스트럭쳐본노이즈가 혼재하는 형태의 소음에 대한 시험은 어려운 실정이었다.By the way, the performance test of the conventional sound absorbing and insulating member is mainly used for the evaluation of the airborne noise through the speaker excitation (speaker excitation) using the speaker, the structure of the airborne noise, although the evaluation is also made It was difficult to test noise in the form of mixed noise and structure bone noise.

종래의 장치들은 에어본노이즈나 스트럭쳐본노이즈 각각의 소음원에 대한 평가만 가능하여, 각 소음원의 상호작용을 파악하기는 어려운 문제점이 있었다.Conventional devices can only evaluate the noise source of each airborne noise or structured bone noise, it is difficult to grasp the interaction of each noise source.

본 발명의 목적은 실제 차량에서 발생하는 소음과 보다 유사한 상태 즉, 에어본노이즈와 스트럭쳐본노이즈가 혼재하고 있는 상태에서의 흡차음부재의 성능을 측정할 수 있는 장치를 제공함을 그 목적으로 한다.An object of the present invention is to provide a device capable of measuring the performance of the sound absorbing and insulating member in a state more similar to the noise generated in an actual vehicle, that is, a mixture of airborne noise and structured bone noise.

도 1은 본 발명에 따른 차음성능 측정장치의 입체적 구성도,1 is a three-dimensional configuration diagram of the sound insulation performance measuring apparatus according to the present invention,

도 2는 본 발명에 따른 차음성능 측정장치의 단면 구성도,2 is a cross-sectional configuration of the sound insulation performance measuring apparatus according to the present invention,

도 3a 및 3b는 본 발명에 따른 차음성능 측정장치의 사용상태를 나타낸 구성도,3a and 3b is a configuration diagram showing a state of use of the sound insulation performance measuring apparatus according to the present invention,

도 4는 본 발명에 따른 차음성능 측정장치를 이용하여 차음성능을 측정한 결과값의 일예를 나타낸 그래프임.Figure 4 is a graph showing an example of the result of measuring the sound insulation performance using the sound insulation performance measuring apparatus according to the present invention.

< 도면의 주요부분에 관한 부호의 설명 ><Description of the code | symbol about the principal part of drawing>

100 : 가진팸버 120 : 진동자100: Pumber 120: vibrator

140 : 스피커 200 : 청음챔버140: speaker 200: listening chamber

250 : 마이크로폰 300 : 프레임250: microphone 300: frame

310 : 금속판 320 : 흡차음부재310: metal plate 320: sound absorbing and insulating member

이러한 목적을 달성하기 위하여 본 발명은 흡차음부재의 차음성능 측정장치에 있어서, 에어본노이즈를 발생시키기 위한 스피커; 스트럭처본노이즈를 발생시키기 위한 진동자; 상기 스피커와 진동자를 구비하고 있는 가진챔버; 상기 가진챔버 상에 설치되며, 내부에 소음측정을 위한 마이크로폰을 구비하는 청음챔버; 및 상기 가진챔버와 청음챔버의 사이에 구비되어 흡차음부재를 고정하기 위한 프레임;으로 이루어진다.In order to achieve the above object, the present invention provides a sound insulation performance measuring apparatus of the sound absorbing and insulating member, comprising: a speaker for generating airborne noise; An oscillator for generating structure bone noise; An excitation chamber having said speaker and a vibrator; A hearing chamber installed on the excitation chamber and having a microphone for noise measurement therein; And a frame provided between the excitation chamber and the listening chamber to fix the sound absorbing and insulating member.

상기 청음챔버는 각 벽면이 서로 뒤틀려 있고, 벽면에는 디퓨젼 콘을 구비하여 잔향실에 가까운 구조를 가짐이 바람직하다.The listening chamber is preferably each wall surface is twisted with each other, the wall surface has a diffusion cone to have a structure close to the reverberation chamber.

이하 본 발명의 바람직한 실시예를 첨부된 도면들에 의거하여 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 차음성능 측정장치의 입체적 구성도이다.1 is a three-dimensional configuration of the sound insulation performance measuring apparatus according to the present invention.

도시된 바와 같이 본 발명의 차음성능 측정장치는 소음 및 진동을 발생시키는 가진챔버(100)와, 소음 측정장소인 청음챔버(200), 상기 가진챔버(100)와 청음챔버(200)의 사이에 흡차음부재(320)을 고정시킬 수 있도록 하는 프레임(300)으로 이루어진다.As shown, the sound insulation performance measuring apparatus of the present invention includes an excitation chamber 100 that generates noise and vibration, and a listening chamber 200 that is a noise measurement location, between the excitation chamber 100 and the listening chamber 200. The frame 300 is configured to fix the sound absorbing and insulating member 320.

상기 가진챔버(100)의 내부에는 흠차음부재(320)가 부착된 금속판(미도시)을 가진시키기 위한 진동자(120)와 공기중으로 전파되는 소음을 재현시키기 위한 스피커(140)를 장착시킨다. 상기 진동자(120)는 가진챔버(100)에 나사(122)로 고정되어 있어서, 상기 나사의 조절로 위치를 변경할 수 있음이 바람직하며, 또한 상기 진동자(120)의 끝단은 시편(흡차음부재가 적층된 금속판)에 밀착되어 진동자(120)의 진동을 시편에 전달하게 된다.Inside the excitation chamber 100 is equipped with a vibrator 120 for causing a metal plate (not shown) to which the sound insulation member 320 is attached and a speaker 140 for reproducing noise propagated into the air. The vibrator 120 is fixed to the excitation chamber 100 with a screw 122, it is preferable that the position can be changed by the adjustment of the screw, and the end of the vibrator 120 is a specimen (suction sound absorbing member is Metal sheet) to be in close contact with each other to transfer the vibration of the vibrator 120 to the specimen.

진동자(120)만으로 시편을 가진시키면 차체 진동에 의한 소리의 복사 효과를 테스트할 수 있으며, 스피커(140)만을 작동하여 시편을 가진시키면 순수한 차음성능을 테스트할 수 있다.Excitation of the specimen with only the vibrator 120 can test the radiation effect of the sound due to the vehicle body vibration, and if only the speaker 140 is operated to excite the specimen, pure sound insulation performance can be tested.

또한, 진동자(120)와 스피커(140)를 동시에 작동하여 실제차량의 소음과 유사한 스트럭쳐본노이즈와 에어본노이즈가 결합된 환경의 재현이 가능하게 되므로보다 실제상황에 가까운 상태에서 차음성능을 테스트 할 수 있게 된다.In addition, by operating the vibrator 120 and the speaker 140 at the same time, it is possible to reproduce the environment combined with the structure bone noise and airborne noise similar to the noise of the actual vehicle, so that the sound insulation performance can be tested in a state closer to the actual situation. It becomes possible.

도 2는 본 발명에 따른 차음성능 측정장치의 단면 구성도이다.2 is a cross-sectional view of the sound insulation performance measuring apparatus according to the present invention.

가진챔버(100)와 청음챔버(200)의 사이에 위치하는 프레임(300)에 고정되는 시편은 흡차음부재가 금속판에 적층된 것으로, 금속판은 차체 패널의 역할을 하게 된다. 이것은 차체 패널의 내부에 흡차음부재가 부착되는 차량의 실제조건과 동일조건을 조성하여 테스트 결과의 신뢰성을 확보하기 위한 것이다. 또한, 본 발명에 따른 차음성능 측정장치는 시편을 프레임에 고정할 수만 있으면 그 시편의 테스트가 가능하므로, 시편의 형상이 단순 평면이 아닌 곡면형상의 것도 측정 할 수 있게 된다.The specimen fixed to the frame 300 positioned between the excitation chamber 100 and the listening chamber 200 is a sound absorbing and insulating member is laminated on a metal plate, the metal plate serves as a vehicle body panel. This is to ensure the reliability of the test results by establishing the same conditions as the actual conditions of the vehicle to which the sound absorbing and insulating member is attached to the inside of the vehicle body panel. In addition, the sound insulation performance measuring apparatus according to the present invention can test the specimen as long as the specimen can be fixed to the frame, so that the shape of the specimen can be measured in a curved shape instead of a simple plane.

상기 청음챔버(200)는 벽면에 잔향을 위한 디퓨전 콘(210)을 설치하고, 청음챔버 벽면의 형상도 6면이 서로 뒤틀린 형상을 가지도록 하여 완전 잔향실에 가깝도록 설계되는 것이 바람직하다. 상기 청음챔버(200)는 상하 운동이 가능하도록 수직나사(202)로 가진챔버(100)와 결합하고 있어서, 시편 장착후 청음챔버(200)를 하강시켜서 청음챔버(200)와 시편 그리고 가진챔버(100)가 완전히 밀착되도록 함으로써 스피커 가진음 및 플레이트 방사음 등의 음원이 새지 않도록 한다.The listening chamber 200 is preferably designed so as to be close to the complete reverberation chamber by installing a diffusion cone 210 for reverberation on the wall, and having the shape of the listening chamber wall has six shapes that are twisted with each other. The listening chamber 200 is coupled to the chamber 100 as a vertical screw 202 to enable the vertical movement, by lowering the listening chamber 200 after mounting the specimen, listening chamber 200 and the specimen and the vibration chamber ( 100) to be in close contact so that sound sources such as speaker excitation sound and plate radiation sound does not leak.

도 3a 및 3b는 본 발명에 따른 차음성능 측정장치의 사용상태를 나타낸 것으로, 도 3a에서는 금속판(310)만을 프레임(300)에 고정한 상태에서 마이크로폰(250)으로 소음을 측정하는 상태를 나타낸 것이고, 도 3b는 상기 금속판(310)에 흡차음부재(320)를 적층한 상태에서 마이크로폰(250)으로 소음을 측정하는 상태를 나타낸 것이다.3A and 3B illustrate a state of use of the sound insulation performance measuring apparatus according to the present invention. In FIG. 3A, noise is measured by the microphone 250 while only the metal plate 310 is fixed to the frame 300. 3B illustrates a state in which noise is measured by the microphone 250 in a state in which the sound absorbing and insulating member 320 is stacked on the metal plate 310.

본 발명에 따른 차음성능 측정장치는 흡차음부재(320)의 차음성능을 측정하기 위한 것으로서, 금속판(310)만 프레임(300)에 고정되어 있을 때의 소음도와 상기 금속판(310)에 흡차음부재(320)를 적층한 상태에서의 소음도를 측정하여 그 값을 비교함으로써 흡차음부재(320)의 차음성능을 측정하게 된다.The sound insulation performance measuring apparatus according to the present invention is for measuring the sound insulation performance of the sound absorbing and insulating member 320, and the noise level when only the metal plate 310 is fixed to the frame 300 and the sound absorbing and insulating member on the metal plate 310. The sound insulation performance of the sound absorbing and insulating member 320 is measured by measuring the noise level in the stacked state 320 and comparing the values.

도 4는 본 발명에 따른 차음성능 측정장치를 이용하여 차음성능을 측정한 결과값의 일예를 나타낸 그래프이다.Figure 4 is a graph showing an example of the result of measuring the sound insulation performance using the sound insulation performance measuring apparatus according to the present invention.

도시된 바와 같이, 가로축은 소음의 주파수를 나타낸 것이고 세로축은 음압레벨을 나타낸 것인데, 금속판(310)만 장착된 상태에서의 음압레벨(A)과 상기 금속판에 흡차음부재(320)를 적층한 상태에서의 음압레벨(B)의 차이가 흡차음부재(320)의 주파수별 차음성능(C)을 나타내게 된다.As shown, the horizontal axis represents the frequency of noise and the vertical axis represents the sound pressure level, the sound pressure level (A) in a state where only the metal plate 310 is mounted and the sound absorbing and insulating member 320 is laminated on the metal plate. The difference in the sound pressure level (B) in the represents the sound insulation performance (C) for each frequency of the sound absorbing and insulating member 320.

본 발명에 따른 차음성능 측정장치는 차량의 실제 소음과 유사한 에어본노이즈와 스트럭처본노이즈가 혼재한 상태에서의 흡차음부재의 성능을 측정할 수 있게 해준다. 따라서 보다 정확한 자료로 흡차음부재의 성능을 평가할 수 있는 효과를 가져오게 된다.The sound insulation performance measuring apparatus according to the present invention enables to measure the performance of the sound absorbing and insulating member in a mixture of airborne noise and structurebone noise similar to the actual noise of a vehicle. Therefore, more accurate data will have the effect of evaluating the performance of the sound absorbing and insulating member.

Claims (2)

흡차음부재의 차음성능 측정장치에 있어서,In the sound insulation performance measuring apparatus of the sound absorbing and insulating member, 에어본노이즈를 발생시키기 위한 스피커;A speaker for generating airborne noise; 스트럭처본노이즈를 발생시키기 위한 진동자;An oscillator for generating structure bone noise; 상기 스피커와 진동자를 구비하고 있는 가진챔버;An excitation chamber having said speaker and a vibrator; 상기 가진챔버 상에 설치되며, 내부에 소음측정을 위한 마이크로폰을 구비하는 청음챔버; 및A hearing chamber installed on the excitation chamber and having a microphone for noise measurement therein; And 상기 가진챔버와 청음챔버의 사이에 구비되어 흡차음부재를 고정하기 위한 프레임으로 이루어지는 것을 특징으로 하는 차음성능 측정장치.The sound insulation performance measuring device, characterized in that formed between the excitation chamber and the hearing chamber made of a frame for fixing the sound absorbing and insulating member. 제 1 항에 있어서,The method of claim 1, 상기 청음챔버는 각 벽면이 서로 뒤틀려 있고, 벽면에는 디퓨젼 콘을 구비하는 것을 특징으로 하는 차음성능 측정장치.The acoustic chamber is a sound insulation performance measuring device, characterized in that each wall surface is twisted with each other, the wall surface has a diffusion cone.
KR1020030039317A 2003-06-18 2003-06-18 Noise Shielding performance testing device KR20040110136A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
KR20220086952A (en) 2020-12-17 2022-06-24 현대자동차주식회사 A device of measuring both noise and vibration and method for measuring both noise and vibration using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220086952A (en) 2020-12-17 2022-06-24 현대자동차주식회사 A device of measuring both noise and vibration and method for measuring both noise and vibration using the same

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