KR20010063976A - Method for getting a standard quantity to a noise on the inside of a car - Google Patents

Method for getting a standard quantity to a noise on the inside of a car Download PDF

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KR20010063976A
KR20010063976A KR1019990062089A KR19990062089A KR20010063976A KR 20010063976 A KR20010063976 A KR 20010063976A KR 1019990062089 A KR1019990062089 A KR 1019990062089A KR 19990062089 A KR19990062089 A KR 19990062089A KR 20010063976 A KR20010063976 A KR 20010063976A
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noise
average
vehicle
quantifying
sound quality
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KR1019990062089A
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Korean (ko)
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KR100350113B1 (en
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김정우
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이계안
현대자동차주식회사
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/18—Internal lining, e.g. insulating
    • B61D17/185—Internal lining, e.g. insulating for sound insulating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
    • G01D1/02—Measuring arrangements giving results other than momentary value of variable, of general application giving mean values, e.g. root means square values

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: A noise quantifying method for a vehicle room is provided to achieve objective evaluation on the noise in the vehicle room by obtaining noise in the room under a predetermined vehicle running condition and computing a correlation between subjective evaluation results on the noise and objective factors. CONSTITUTION: A noise quantifying method for a vehicle room includes the steps of making a vehicle running state be a first running state in which a shift gear is in the second stage position and an engine rpm is 1500-6000rpm(S200), obtaining a room noise in the first running state, computing an average SPL, an average loudness, an average fluctuation, and an average roughness from noise generated in the first running state(S400), storing the average values in ascii files(S500), and quantifying sound factors with respect to scilent, dynamic, and pleasant states from values read from the files(S600).

Description

차량 실내 소음 정량화 방법{METHOD FOR GETTING A STANDARD QUANTITY TO A NOISE ON THE INSIDE OF A CAR}METHOOD FOR GETTING A STANDARD QUANTITY TO A NOISE ON THE INSIDE OF A CAR}

이 발명은 자동차의 실내 소음 개선 시험 방법에 관한 것으로, 특히, 특정 운전 조건 상태에서의 차량 실내 음을 취득하고 이 음을 주관적 평가를 통해 정리한 후 이 결과와 객관적 요소와의 상관관계를 계산하여 주관적 청감을 정량화하는 방법에 관한 것이다.The present invention relates to a test method for improving the indoor noise of a vehicle, and in particular, to acquire a vehicle interior sound under a specific driving condition and to arrange the sound through subjective evaluation, and then to calculate the correlation between the result and the objective element. To quantify subjective hearing.

일반적으로, 시동 온시 차량의 실내에는 차량에서 발생하는 소음에 영향을 미치게 되고, 그 강도에 따라 운전자의 신경을 거슬리게 된다. 그러므로, 차량 테스트시 차량 외부 소음과 더불어 차량 실내 소음 측정을 한다.In general, the interior of the vehicle at start-up affects the noise generated by the vehicle, and the driver's nerves are disturbed depending on the intensity. Therefore, the vehicle interior noise measurement is taken in addition to the vehicle exterior noise during the vehicle test.

보통, 차량 실내 소음은 사운드(sound) 레벨(level) 측정기를 이용하여 그수치를 측정하는데, 이때의 수치에 따라 탑승자 또는 평가자는 실내 소음의 정도를 평가하게 된다.Normally, vehicle interior noise is measured using a sound level meter, whereby the occupant or evaluator evaluates the degree of interior noise.

그러나, 이때의 평가는 탑승자 또는 평가자의 주관적인 요소에 의해 평가가 이루어진다. 단순한 사운드(sound) 레벨(level) 측정기만으로 인간의 주관적인 느낌 즉, 인간의 청감을 정량화하기는 불가능하다.However, the evaluation at this time is based on the subjective factors of the occupant or evaluator. It is not possible to quantify the subjective feeling of human, ie, human hearing, with a simple sound level meter alone.

따라서, 이 발명은 차량이 실내 소음을 정량화하여 주관적 평가가 가능하도록 하는 차량 실내 소음 정량화 방법을 제공한다.Accordingly, the present invention provides a vehicle interior noise quantification method for allowing a vehicle to quantify interior noise to allow subjective evaluation.

도1은 이 발명의 실시예에 따른 차량 실내 소음 정량화 장치의 블록 구성도이다.1 is a block diagram of a vehicle interior noise quantification device according to an embodiment of the present invention.

도2는 이 발명의 실시예에 따른 차량 실내 소음 정량화를 위한 플로우챠트(flowchart)이다.2 is a flowchart for quantifying vehicle interior noise according to an embodiment of the present invention.

상기한 기술적 과제를 달성하기 위한 이 발명의 특징에 따른 차량 실내 소음 정량화 방법은,Vehicle interior noise quantification method according to a feature of the present invention for achieving the above technical problem,

특정 차량 주행 조건에서 발생하는 실내 소음을 소음 측정 장치로 측정한 다음, 소음 인자들의 평균치를 구하고, 소음 인자들로부터 정숙함, 힘있음, 쾌적함에 대한 음질 인자를 구한다. 이때, 평균 음질 인자로부터 구해지는 정숙함, 힘있음, 쾌적함에 대한 음질 인자는 주관적인 평가 결과와 객관적인 인자들간의 회귀 분석을 통해 만들어진 계수가 이용된다.The indoor noise generated in a specific vehicle driving condition is measured by a noise measuring device, and then averaged of the noise factors, and the sound quality factors for quietness, strength, and comfort are calculated from the noise factors. At this time, the sound quality factor obtained from the mean sound quality factor for quietness, strength, and comfort is used by coefficients generated through regression analysis between the subjective evaluation result and the objective factors.

따라서, 이 발명의 특징에 따른 차량 실내 소음 정량화 장치는, 차량의 실내에서 발생하는 고 해상도로 녹음하는 바이노럴 레코더 시스템(binaural recording system)에 의해 디지털로 변환되어 디지털(digital) 레코더에 저장되는 소음 측정 장치와, 소음 분석 프로그램이 저장되어 있는 컴퓨터를 포함한다.Therefore, the vehicle interior noise quantification device according to the characteristics of the present invention is converted into a digital by a binaural recording system (binaural recording system) that is recorded in the interior of the vehicle is stored in a digital recorder It includes a noise measuring device and a computer in which a noise analysis program is stored.

한편, 이 발명의 특징에 따른 차량 실내 소음 정량화 방법은,On the other hand, the vehicle interior noise quantification method according to the characteristics of the present invention,

차량의 주행 상태를 제1 주행 상태가 되도록 하는 단계;Making a driving state of the vehicle into a first driving state;

상기 제1 주행 상태일때의 실내 음을 취득하는 단계;Acquiring room sounds in the first driving state;

제2 주행 상태에서 발생하는 차량의 소음으로부터 평균 SPL, 평균 라우드니스(loudness)(이하 ' 평균 시끄러움'이라 칭함), 평균 플렉튜에이션 스트렝스(fluctuation strength)(이하 ' 평균 불안정'이라 칭함), 평균 러프니스(roughness)(이하 ' 평균 거슬림'이라 칭함)를 계산하는 단계;Average SPL, average loudness (hereinafter referred to as 'average loudness'), average fluctuation strength (hereinafter referred to as 'average instability'), and average roughness from vehicle noise occurring in the second driving condition Calculating a roughness (hereinafter referred to as 'average grudge');

상기 평균값들을 아스키(ascii) 파일로 저장하는 단계;Storing the average values in an ascii file;

저장한 파일을 읽어들이고 이를 통해 정숙함, 힘있음, 쾌적함에 대한 음질 인자를 정량화시키는 단계를 포함한다.Reading the stored file and quantifying the sound quality factors for quietness, strength, and comfort.

이하, 첨부한 도1을 참조로 이 발명의 실시예에 따른 차량 실내 소음 정량화 방법을 설명한다.Hereinafter, with reference to the accompanying Figure 1 will be described a vehicle interior noise quantification method according to an embodiment of the present invention.

도1은 이 발명의 실시예에 따른 차량 실내 소음 정량화 장치의 블록 구성도이다. 도1에 도시되어 있듯이, 이 발명의 실시예에 따른 실내 소음 정량화 장치는,1 is a block diagram of a vehicle interior noise quantification device according to an embodiment of the present invention. As shown in Figure 1, the indoor noise quantification device according to an embodiment of the present invention,

차량의 실내에서 발생하는 음을 바이노럴 마이크가 내장된 톨소우(torso)(110)를 이용하여 검출하고, 이를 ADC(analog to digital converter)에서 디지털 신호로 변환시키며 이 신호를 녹음 및 재생 감도가 뛰어난 디지탈 DAT(digital audiotape) 레코더(130)에 녹음시키는 소음 측정 장치(100)와,The sound generated in the interior of the vehicle is detected using a torso 110 with a built-in binaural microphone, converted into a digital signal by an analog to digital converter (ADC), and the signal is recorded and reproduced. And a noise measuring device (100) for recording on a digital DAT (digital audiotape) recorder having excellent

상기 DAT 레코더(130)에 녹음시킨 차량의 실내음을 저장된 소음 분석 프로그램을 통해 분석하는 컴퓨터(200)를 포함한다.Computer 200 for analyzing the indoor sound of the vehicle recorded on the DAT recorder 130 through the stored noise analysis program.

상기와 같이 구성된 이 발명의 실시예에 따른 차량 실내 소음 정량화 장치를 도2를 참조로 설명한다.An indoor vehicle quantification apparatus according to an embodiment of the present invention configured as described above will be described with reference to FIG.

도2는 이 발명의 실시예에 따른 차량 실내 소음 정량화를 위한 플로우챠트(flowchart)이다.2 is a flowchart for quantifying vehicle interior noise according to an embodiment of the present invention.

도2에 도시되어 있듯이, 우선, 실험자는 차량 실내 소음을 측정하기 위한 장치(100)의 헤드 톨소우 즉, 바이노럴 레코딩 톨소우(110)를 차량의 조수석에 세팅(setting)한다.As shown in Fig. 2, first, the experimenter sets the head toll of the apparatus 100 for measuring vehicle interior noise, that is, the binaural recording toll sole 110, in the passenger seat of the vehicle.

여기서, 헤드 톨소우(110)는 조수석에만 한정되어 설치되지 않고 차량 실내 어디든지 설치 가능하다(S100).Here, the head torso 110 is not limited to the passenger seat and can be installed anywhere in the vehicle (S100).

실험자는 상기와 같이 소음 측정 장치(100)의 헤드 톨소우(110)를 설치하면 차량을 시동 온 상태로 한 다음, 차량을 설정 주행 조건이 되도록 한다. 설정 주행 조건은 2단 가속 상태이고, 엔진 회전수가 1500∼6000rpm 사이가 되도록 한다.When the experimenter installs the head torso 110 of the noise measuring apparatus 100 as described above, the vehicle is turned on and then the vehicle is set to a driving condition. The set running condition is a two-stage acceleration state, and the engine speed is between 1500 and 6000 rpm.

여기서, 설정 주행 조건은 실험자에 따라 임의로 변경 가능하다(S200).Here, the set running conditions can be arbitrarily changed according to the experimenter (S200).

차량이 설정 주행 조건이 되면, 실험자는 조수석에 설치한 소음 측정 장치(100)의 바이노럴 디지탈 레코더(130)를 구동시킨다.When the vehicle is in a set driving condition, the experimenter drives the binaural digital recorder 130 of the noise measuring apparatus 100 installed in the passenger seat.

그런 다음, 차량의 실내에서 검출되는 음파를 마이크가 내장된 바이노럴 레코딩 톨소우(110)을 통해 검출하고 ADC(120)를 통해 디지탈 신호로 변환시킨 다음, 바이노럴 디지탈 레코더(130)에 이를 저장한다.Then, the sound wave detected in the interior of the vehicle is detected through the binaural recording toll-so 110 with a built-in microphone, and converted into a digital signal through the ADC 120, and then the binaural digital recorder 130 Save it.

그리고, 소음 출력 장치(100)는 검출한 소음의 결과치인 디지털 신호를 아스키 파일로 컴퓨터(200)에 입력되도록 한다(S300).In addition, the noise output apparatus 100 may input the digital signal, which is a result of the detected noise, into the computer 200 as an ASCII file (S300).

한편, 실험자는 차량에서 발생하는 음 신호 중에서 운전자가 소음이라고 느낄 수 있는 주파수대의 음파를 검출하는데, 이때 운전자가 소음이라고 느낄 수 있는 음의 주파수대는 엔진 회전수가 3000∼6000rpm 사이에서 발생하게 된다.On the other hand, the experimenter detects the sound waves generated by the vehicle in the frequency band that the driver can feel the noise, at this time, the frequency band of the sound that the driver can feel the noise is generated between 3000 ~ 6000rpm engine speed.

이렇게, 차량의 엔진 회전수가 3000∼6000rpm에서 발생하는 음 신호는 컴퓨터에 입력되고, 컴퓨터(200)는 입력하는 음 신호를 미리 저장되어 있는 음파 처리 프로그램에 의해 소음 출력 장치에서 출력하는 신호로부터 표준화된 다수의 평균 소음 신호를 계산한다.In this way, a sound signal generated at an engine speed of 3000 to 6000 rpm of the vehicle is input to a computer, and the computer 200 normalizes the input sound signal from a signal output from the noise output device by a sound wave processing program stored in advance. Compute multiple average noise signals.

여기서, 다수의 평균 소음 음질은 평균 SPL이고, 평균 시끄러움, 평균 불안정, 및 평균 거슬림으로, 각 평균 소음 음질은 소음 출력 장치(100)에서 출력하는 신호의 해당 주파수대에 있는 음질로서, 각각 서로 다른 주파수대를 가진다.Here, the plurality of average noise sound quality is the average SPL, average loudness, average instability, and average annoyance, each average noise sound quality is the sound quality in the corresponding frequency band of the signal output from the noise output device 100, each different frequency band Has

따라서, 컴퓨터(200)는 소음 출력 장치(100)에서 출력하는 신호를 처리하고 필터링 하여 해당하는 주파수대의 신호를 검출하고 이를 평균하여 평균 SPL, 평균 시끄러움, 평균 불안정 및 평균 거슬림에 대한 소음 음질을 계산한다(S400).Therefore, the computer 200 processes and filters a signal output from the noise output device 100 to detect a signal of a corresponding frequency band and averages the calculated sound quality for average SPL, average loudness, average instability and average noise. (S400).

이렇게 구해진 평균 SPL, 평균 시끄러움, 평균 불안정 및 평균 거슬림의 소음 신호는 아스키 파일로 저장된다(S500).Thus obtained average SPL, average loudness, average instability and average noise signal of the noise is stored as an ASCII file (S500).

그리고, 컴퓨터(200)는 아스키 파일로 저장된 평균 소음 신호들을 읽어들여 음질 인자를 계산한다.Then, the computer 200 reads the average noise signals stored in the ASCII file and calculates a sound quality factor.

이때, 계산되는 음질 인자는 정숙함, 힘있음, 쾌적함에 대한 것으로, 다음의 수학식1, 수학식2, 수학식3으로 구해진다.At this time, the calculated sound quality factor is about quietness, strength, and comfort, and is obtained by the following equations (1), (2) and (3).

정숙함= 2.35 - (0.079 ×평균 시끄러움)Quietness = 2.35-(0.079 × average loudness)

힘있음 = -5.552 + (0.078 ×평균 SPL) + (0.604×평균 불안정)Power = -5.552 + (0.078 × Average SPL) + (0.604 × Average Instability)

쾌적함 = 4.685 - (0.047×평균SPL) - (1.765×평균 거슬림)Comfort = 4.685-(0.047 × Average SPL)-(1.765 × Average Violence)

상기와 같은 수학식에 의해 평균 소음으로부터 차량의 실내에서 발생하는 음 신호의 정숙함, 힘있음, 쾌적함에 대한 수치가 측정된다.The numerical value for the quietness, power, and comfort of the sound signal generated in the vehicle interior is measured from the average noise by the above equation.

이러한 정숙함, 힘있음, 쾌적함은 실험자에 의한 주관적인 요소와 평균 소음 신호로부터 얻어지는 객관적인 요소들로서 얻어지는 것이다.This quietness, strength, and comfort are obtained as subjective elements by the experimenter and objective elements obtained from the average noise signal.

따라서, 소음에 대하여 운전자가 느끼는 정도를 상기와 같이 이 발명의 동작에 통해 얻어진 정숙함, 힘있음, 쾌적함 및 소음에 대한 측정치로서 객관성 있게 평가할 수 있게 된다.Therefore, the degree to which the driver feels about the noise can be objectively evaluated as a measure for quietness, strength, comfort and noise obtained through the operation of the present invention as described above.

이 발명은 차량의 실내에서 발생하는 음을 정량화하므로서, 차량의 실내에서 발생하는 소음에 대한 객관적인 평가가 가능하도록 하는 효과가 있다.The present invention has the effect of enabling an objective evaluation of the noise generated in the interior of the vehicle by quantifying the sound generated in the interior of the vehicle.

Claims (3)

차량의 주행 상태를 제1 주행 상태가 되도록 하는 단계;Making a driving state of the vehicle into a first driving state; 상기 제1 주행 상태일때의 실내 음을 취득하는 단계;Acquiring room sounds in the first driving state; 제2 주행 상태에서 발생하는 차량의 소음으로부터 평균 SPL, 평균 시끄러움(loudness), 평균 불안정(fluctuation), 평균 거슬림(roughness)을 계산하는 단계;Calculating an average SPL, average loudness, average fluctuation, and average roughness from the noise of the vehicle occurring in the second driving state; 상기 평균값들을 아스키 파일로 저장하는 단계;Storing the average values in an ASCII file; 저장한 파일을 읽어들이고 읽어들인 값들로부터 정숙함, 힘있음, 쾌적함에 대한 음질 인자를 정량화시키는 단계를 포함하는 차량 실내 소음 정량화 방법.A method of quantifying vehicle interior noise comprising reading a stored file and quantifying sound quality factors for quietness, strength, and comfort from the read values. 제1항에 있어서,The method of claim 1, 상기 제1 주행 상태는,The first driving state is, 2단 가속이고, 엔진 회전수가 1500∼6000rpm인 것을 특징으로 하는 차량 셀내 소음 정량화 방법.A two-stage acceleration, and the engine speed is 1500 ~ 6000rpm, characterized in that the vehicle cell noise quantification method. 제1항에 있어서,The method of claim 1, 상기 음질 인자를 정량화 하는 단계는,Quantifying the sound quality factor, 2.35 - (0.079 ×평균 시끄러움)의 연산으로 정숙함에 대한 음질 인자를 구하는 단계, -5.552 + (0.078 ×평균 SPL) + (0.604×평균 불안정)의 연산으로 힘있음에 대한 음질 인자를 구하는 단계와, 4.685 - (0.047×평균SPL) - (1.765×평균 거슬림)의 연산으로 쾌적함에 대한 음질 인자를 구하는 단계로 이루어진 차량 실내 소음 정량화 방법.Calculating the sound quality factor for quietness by operation of 2.35-(0.079 × average loudness), and calculating the sound quality factor for power by operation of -5.552 + (0.078 × average SPL) + (0.604 × average instability), A method for quantifying vehicle interior noise, comprising calculating sound quality factors for comfort by calculating 4.685-(0.047 × average SPL)-(1.765 × average grain).
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CN102589680A (en) * 2012-02-29 2012-07-18 重庆长安汽车股份有限公司 Method for quantitatively evaluating knocking noise of transmission system by using language definition
CN104102803A (en) * 2013-04-07 2014-10-15 上海工程技术大学 Vehicle noise sound quality roughness information processing method

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KR100925828B1 (en) 2007-12-14 2009-11-06 현대자동차주식회사 Method of expressing the quality of the sound in vehicle as the quantitive equation and device thereof

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JPS5924217A (en) * 1982-07-30 1984-02-07 Toyota Motor Corp Noise analyzer for vehicle
JPH05248933A (en) * 1992-03-03 1993-09-28 Alpine Electron Inc Noise amount judging system
JPH08297048A (en) * 1995-04-26 1996-11-12 Honda Motor Co Ltd Evaluation method for aerodynamic noise

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CN102589680A (en) * 2012-02-29 2012-07-18 重庆长安汽车股份有限公司 Method for quantitatively evaluating knocking noise of transmission system by using language definition
CN102589680B (en) * 2012-02-29 2015-06-03 重庆长安汽车股份有限公司 Method for quantitatively evaluating knocking noise of transmission system by using language definition
CN104102803A (en) * 2013-04-07 2014-10-15 上海工程技术大学 Vehicle noise sound quality roughness information processing method

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