CN108267321A - A kind of test and evaluation method of car acpistocs packaging sound absorption performance - Google Patents
A kind of test and evaluation method of car acpistocs packaging sound absorption performance Download PDFInfo
- Publication number
- CN108267321A CN108267321A CN201611252481.0A CN201611252481A CN108267321A CN 108267321 A CN108267321 A CN 108267321A CN 201611252481 A CN201611252481 A CN 201611252481A CN 108267321 A CN108267321 A CN 108267321A
- Authority
- CN
- China
- Prior art keywords
- microphone
- sound source
- test
- volume
- absorption performance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
Abstract
A kind of test of car acpistocs packaging sound absorption performance and appraisal procedure, sound absorption performance is packed by the P/Q values measured to the acoustics of vehicle to evaluate, as a result it is more credible, it is truer, reduce is influenced or error that when other conditions influence brings to test evaluation result by microphone quantity, result precision is high, comprehensive good, the whole NVHN performances for having reacted vehicle；Simultaneously this programme include vehicle often with noise source, it is comprehensive, direct, efficiently, effective test method.The test method of this method application is simple, has very strong versatility, can adapt to assessment of the various acoustics packet to noise sound absorption performance, experimentation cost is cheap.
Description
Technical field
The present invention relates to the test and evaluation fields of car acpistocs packaging sound absorption performance, and in particular to a kind of car acpistocs
Pack the test and evaluation method of sound absorption performance.
Background technology
With popularizing for automobile, consumer requires automobile noise higher and higher.And car acpistocs packet is as pass-by noise
Barrier on internal car noise influence it is very big, the sound absorption performance of test and evaluation acoustics packet is critically important on vehicle, in acoustics packet
The early period and later stage of exploitation are filled, how correctly to assess car acpistocs packaging sound absorption performance is always a problem.
At present, car acpistocs packaging monomer sound absorption performance（NVH performances）Test and evaluation need by standing wave tube or
Alpha's acoustic cabin, the test of monomer can not comprehensive assessment vehicle NVH performance levels, the performance of acoustics packet monomer can only be evaluated
Situation up to standard.The NVH Performance Evaluations of car acpistocs packet entirety are needed by reverberation chamber, and it is higher to build reverberation chamber cost, leases it
The reverberation chamber of its company is time-consuming and laborious, and cost is not also low, and kart enterprise is difficult to adopt this method to vehicle carry out sound
The sound absorption performance for learning packaging carries out test and evaluation.
Invention content
Test and appraisal procedure the object of the present invention is to provide a kind of car acpistocs packaging sound absorption performance, can be fast
The problem of speed, assessment car acpistocs packaging sound absorption performance of high efficiency and low cost, achieve effective control car acpistocs packet NVH
The purpose of energy.
The technical solution adopted by the present invention to solve the technical problems is：A kind of survey of car acpistocs packaging sound absorption performance
Examination and evaluation method, equipment include the microphone, record and the processing sound that make a sound the volume sound source of signal, receive voice signal
The data acquisition equipment of sound signal, includes the following steps：
（1）Vehicle is placed on whole elimination room（Or semianechoic room）It is interior；
（2）Volume sound source is arranged in passenger compartment, sends out white noise, sound pressure level is not less than 100dB (A)；
（3）Microphone is arranged in specific position, is connect with data acquisition device, and carries out Initialize installation；
（4）The measuring microphone signal in analysis software, records 10s, and valid data acquire 4 groups；
（5）Record the collected sound pressure level SPL of far-field noise collecting unitFar field sound pressureAnd volume sound source exports incidence wave and back wave
Acoustic pressure P+And P-, and obtain according to following formula the near field volume velocity of the collected volume sound source of Noise Acquisition unit：
QVolume sound source near field=S (P+-P-) /ρc；
Wherein, S represents volume sound source nozzle sectional area, and ρ represents the atmospheric density of normal atmosphere pressure, and c represents standard atmospheric pressure
Under sound propagation velocity and represent volume sound source outlet incidence wave and back wave acoustic pressure, can be carried by volume sound source two
A microphone is tested；
（6）According to formula P/Q=SPLFar field sound pressure/ QVolume sound source near field, obtain the value of P/Q, and then evaluate car acpistocs packaging sound absorption
Energy.
Further：Different vehicle is compared in P/Q values according to measuring, the high corresponding acoustics packaging of P/Q values inhale every
Acoustic performance is good.
Further：In 400 to 8000Hz, P/Q targets are not less than 20Pa/ (m3/s).
The beneficial effects of the invention are as follows：Inhibiting effect of the acoustics packet to noise is weighed by the value of P/Q, structure more may be used
Letter, more really, reduce is influenced or error that when other conditions influence brings to test evaluation result by microphone quantity, as a result
Accuracy is high, comprehensive good, the whole NVHN performances for having reacted vehicle；This programme is to include vehicle often to use noise source simultaneously
, it is comprehensive, directly, efficiently, effective test method.The test method of this method application is simple, has very strong lead to
With property, assessment of the various acoustics packet to noise sound absorption performance is can adapt to, experimentation cost is cheap.
Description of the drawings
Fig. 1 is the fundamental diagram of the present invention；
Fig. 2 is volume sound source and microphone arrangement schematic diagram；
Fig. 3 is the test equipment connection figure by taking exhaust tail mouth microphone as an example.
Specific embodiment
Embodiment 1
As shown in Figs. 1-3, a kind of test and evaluation method of car acpistocs packaging sound absorption performance, equipment include making a sound
The volume sound source of signal, the microphone for receiving voice signal, record and the data acquisition equipment for handling voice signal, the volume
Sound source output terminal passes through near field noise collecting unit and noise transmission path, far-field noise collecting unit and signal processing list respectively
The input terminal of member is connected；This method includes the following steps：
（1）Vehicle is placed on whole elimination room（Or semianechoic room）It is interior；
（2）Volume sound source is arranged in passenger compartment, sends out white noise, sound pressure level is not less than 100dB (A)；
（3）Microphone is arranged in specific position, is connect with data acquisition device, and carries out Initialize installation；
（4）The measuring microphone signal in analysis software, records 10s, and valid data acquire 4 groups；
（5）Record the collected sound pressure level SPL of far-field noise collecting unitFar field sound pressureAnd volume sound source exports incidence wave and back wave
Acoustic pressure P+And P-, and obtain according to following formula the near field volume velocity of the collected volume sound source of Noise Acquisition unit：
QVolume sound source near field=S (P+-P-) /ρc；
Wherein, S represents volume sound source nozzle sectional area, and ρ represents the atmospheric density of normal atmosphere pressure, and c represents standard atmospheric pressure
Under sound propagation velocity and represent volume sound source outlet incidence wave and back wave acoustic pressure, can be carried by volume sound source two
A microphone is tested；
（6）According to formula P/Q=SPLFar field sound pressure/ QVolume sound source near field, obtain the value of P/Q, and then evaluate car acpistocs packaging sound absorption
Energy.
Further：Different vehicle is compared in P/Q values according to measuring, the high corresponding acoustics packaging of P/Q values inhale every
Acoustic performance is good.
Further：In 400 to 8000Hz, P/Q targets are not less than 20Pa/ (m3/s).
During test, analysis or evaluation car acpistocs packaging sound absorption performance, if finding a certain noise transmission path
P/Q be unsatisfactory for NVH targets, need to investigate acoustics packaging Problems on the path, the content of investigation includes air-tightness, sound
Learn packaging material area coverage, via seal, the transmission loss of acoustics packaging monomer and acoustic absorptivity.
Sound absorption performance of the acoustics packet to automobile noise, test result packet can directly, be efficiently obtained using this method
All paths of noise source are often used containing automobile, it is horizontal to the sound absorption of noise that each noise transmission path can be fully assessed.It should
Method is simple, efficient, input is low, does not need to purchase cost high test equipment and tooling, is not limited by vehicle, is automobile sound
It learns packet NVH performance developments and optimization provides a kind of simple, practical, economic test and appraisal procedure.
Preferably, using 14 microphone test records, volume sound source near field is recorded respectively（Two, volume sound source
It is included）, tire（Four）, air inlet（One）, exhaust（One）And power assembly（Six）.Volume sound source near field microphone is is somebody's turn to do
Equipment carries；Four microphones of tire were arranged in tire axial line YZ planes, apart from tyre sidewall 10cm, apart from ground 15cm,
45 degree obliquely；Air inlet microphone is overlapped with air inlet geometric center lines, is perpendicularly oriented to air inlet, with air inlet section weight
It closes；It is vented microphone and is directed toward exhaust tail mouth to angle at 45 ° with vehicle X, apart from exhaust tail nozzle section 5cm；Power assembly six
Microphone is apart from power assembly six（Above and below, front, rear, left and right）Outer surface 5cm, upper and lower surface microphone are located at each
Surface geometry center is perpendicularly oriented to speed changer upper surface geometric center, right surface along-X to passenger compartment, left surface microphone is directed toward
Microphone edge-Y-direction is perpendicularly oriented to right surface geometry center, and front surface microphone is located at power assembly and cooling fan midpoint, hangs down
Direct to power assembly front surface geometric center, rear surface microphone be located at power assembly rear surface geometric center and fire wall away from
From midpoint edge-Y-direction be directed toward driver.
Preferably：Volume sound source is arranged in driver's cabin chief aviation pilot position, volume sound source nozzle vertically upward, highly with driving
The person's of sailing auris dextra is the same as high.
Preferably：）Test 4 groups of test datas of acquisition, are averaged to test data, obtain more accurate experiment knot
Fruit.
The beneficial effects of the invention are as follows：Inhibiting effect of the acoustics packet to noise is weighed by the value of P/Q, structure more may be used
Letter, more really, reduce is influenced or error that when other conditions influence brings to test evaluation result by microphone quantity, as a result
Accuracy is high, comprehensive good, the whole NVHN performances for having reacted vehicle；This programme is to include vehicle often to use noise source simultaneously
, it is comprehensive, directly, efficiently, effective test method.The test method of this method application is simple, has very strong lead to
With property, assessment of the various acoustics packet to noise sound absorption performance is can adapt to, experimentation cost is cheap.
Embodiment 2
As shown in figure 3,1 is driver's auris dextra volume sound source, 2 be front tyre far field microphone, and 3 be rear tyre far field sensor,
4 be air inlet far field microphone, and 5 be exhaust outlet far field microphone, and 6 be power assembly upper surface microphone, and 7 be volume sound source
The Noise Acquisition unit near field（Volume sound source carries）, 8 be far-field noise collecting unit（Obtained via signal after each transmission path
Take microphone）, 9 be signal processing unit（That is data acquisition equipment）, 10 be noise generation unit（That is volume sound source）, connection
Mode is the prior art, therefore is omitted.
By noise generation unit（That is volume sound source）White noise is sent out, is adopted near noise generation unit using near field noise
Collect unit（Volume sound source carries）The voice signal of noise generation unit is collected, inputs to signal processing unit（I.e. data are adopted
Collect equipment）；In addition, noise generation unit sends out white noise, via each noise transmission path, by the far-field noise in each path
Collecting unit（That is position 2 in Fig. 2, the microphone of 3,4,5,6 arrangements）It obtains, the similary input signal processing unit of signal, carries out
Data analysis and processing.
Test position in the present embodiment is as shown in Fig. 2, testing equipment is arranged in position 1, microphone including volume sound source
It is arranged in position 2,3,4,5,6.
Standard white noise is sent out by volume sound source in the present embodiment, corresponding voice signal is obtained by microphone, by data
Collecting device records voice signal, is played back and is post-processed.
When data analysis and process is carried out in the present embodiment, analysis personnel can obtain the signal of volume sound source via correlation
Noise transmission path（Sound source to tire, sound source to air inlet, sound source is extremely vented, sound source to each outer surface of power assembly）P/Q, P/
The calculation formula of Q is as follows：
P/Q=SPLFar field sound pressure/ QVolume sound source near field
Wherein, the collected sound pressure level of far-field noise collecting unit, Q are representedVolume sound source near fieldRepresent the collected body of Noise Acquisition unit
The near field volume velocity of product sound source.
Have to the near field volume velocity of volume sound source：
QVolume sound source near field=S (P+ - P-) /ρc
The volume velocity mentioned in this patent is collected by the medium-high frequency volume sound source of B＆K companies.
Wherein, S represents volume sound source nozzle sectional area, and ρ represents the atmospheric density of normal atmosphere pressure, and it is big that c represents standard
Sound propagation velocity under air pressure, P+And P-The acoustic pressure of volume sound source outlet incidence wave and back wave is represented, it can be by volume sound source certainly
Two microphones of band are tested.
The P/Q obtained in the present embodiment can design and develop NVH targets, it can also be used to instruct existing vehicle sound as vehicle
Learn the optimization design of packet.
Specific vehicle acoustics packet P/Q performance objectives are not provided in the present embodiment, it is contemplated that the platform and cost of vehicle
Difference, vehicle acoustics packet P/Q performance objectives need to combine the test result system in competing product vehicle test data or database
Fixed, if without competing product vehicle and database, in principle, in 400 to 8000Hz, P/Q targets are not less than 20Pa/ (m3/s)。
In the present embodiment during testing or evaluating certain vehicle acoustics packaging NVH performances, if finding, a certain noise transmits
The P/Q in path is unsatisfactory for NVH targets, needs to investigate acoustics packaging Problems on the path, and the content of investigation is comprising airtight
Property, the transmission loss of acoustics packaging material area coverage, via seal, acoustics packaging material and acoustic absorptivity.
Above-described is only the preferred embodiments of the invention, to those of ordinary skill in the art, not
Under the premise of the technical characteristic for being detached from the present invention, several improvement can also be made, these improvement also should be regarded as the protection of the present invention
Range.
Claims (5)
1. a kind of test and evaluation method of car acpistocs packaging sound absorption performance, equipment include making a sound the volume sound of signal
Source, the microphone for receiving voice signal, record and the data acquisition equipment for handling voice signal, it is characterised in that：Including following
Step：
（1）Vehicle is placed on whole elimination room（Or semianechoic room）It is interior；
（2）Volume sound source is arranged in passenger compartment, sends out white noise, sound pressure level is not less than 100dB (A)；
（3）Microphone is arranged in specific position, is connect with data acquisition device, and carries out Initialize installation；
（4）The measuring microphone signal in analysis software, records 10s, and valid data acquire 4 groups；
（5）Record the collected sound pressure level SPL of far-field noise collecting unitFar field sound pressureAnd volume sound source exports incidence wave and back wave
Acoustic pressure P+And P-, and obtain according to following formula the near field volume velocity of the collected volume sound source of Noise Acquisition unit：
QVolume sound source near field=S (P+-P-) /ρc；
Wherein, S represents volume sound source nozzle sectional area, and ρ represents the atmospheric density of normal atmosphere pressure, and c represents standard atmospheric pressure
Under sound propagation velocity and represent volume sound source outlet incidence wave and back wave acoustic pressure, can be carried by volume sound source two
A microphone is tested；
（6）According to formula P/Q=SPLFar field sound pressure/ QVolume sound source near field, obtain the value of P/Q, and then evaluate car acpistocs packaging sound absorption
Energy.
2. the test and evaluation method of car acpistocs packaging sound absorption performance according to claim 1, it is characterised in that：It adopts
With 14 microphone test records, record respectively, including：Two volume sound source near fields, four tires, an air inlet, one
Exhaust and six power assemblies；One volume sound source near field microphone is carried for the equipment, another volume sound source near field is transaudient
Device is arranged in driver's auris dextra；Four microphones of tire were arranged in tire axial line YZ planes, apart from tyre sidewall 10cm, distance
Ground 15cm, 45 degree obliquely；Air inlet microphone is overlapped with air inlet geometric center lines, is perpendicularly oriented to air inlet, with air inlet
Mouth section overlaps；It is vented microphone and is directed toward exhaust tail mouth to angle at 45 ° with vehicle X, apart from exhaust tail nozzle section 5cm；Power
Six microphones of assembly are apart from power assembly six（Above and below, front, rear, left and right）Outer surface 5cm, upper and lower surface are transaudient
Device is located at each surface geometry center, is perpendicularly oriented in the geometry of speed changer upper surface along-X to passenger compartment, left surface microphone is directed toward
The heart, right surface microphone edge-Y-direction are perpendicularly oriented to right surface geometry center, and front surface microphone is located at power assembly and cooling wind
Midpoint is fanned, is perpendicularly oriented to power assembly front surface geometric center, rear surface microphone is located at power assembly rear surface geometric center
Driver is directed toward with the midpoint edge-Y-direction of fire wall distance.
3. a kind of test and evaluation method of car acpistocs packaging sound absorption performance according to claim 1 or 2, feature
It is：Different vehicle is compared in P/Q values according to measuring, and the high corresponding acoustics packaging sound absorption performance of P/Q values is good.
4. a kind of test and evaluation method of car acpistocs packaging sound absorption performance according to claim 1 or 2, feature
It is：In 400 to 8000Hz, P/Q targets are not less than 20Pa/ (m3/s).
5. a kind of test and evaluation method of car acpistocs packaging sound absorption performance according to claim 1 or 2, feature
It is：Exhaust outlet needs to be blocked with deadener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611252481.0A CN108267321A (en) | 2016-12-30 | 2016-12-30 | A kind of test and evaluation method of car acpistocs packaging sound absorption performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611252481.0A CN108267321A (en) | 2016-12-30 | 2016-12-30 | A kind of test and evaluation method of car acpistocs packaging sound absorption performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108267321A true CN108267321A (en) | 2018-07-10 |
Family
ID=62754024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611252481.0A Pending CN108267321A (en) | 2016-12-30 | 2016-12-30 | A kind of test and evaluation method of car acpistocs packaging sound absorption performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108267321A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211588A (en) * | 2018-09-27 | 2019-01-15 | 安徽江淮汽车集团股份有限公司 | A kind of test method of front wall sound insulation set group vulnerability analysis |
| CN109307608A (en) * | 2018-11-28 | 2019-02-05 | 中车长春轨道客车股份有限公司 | The plugging repair method of vehicle semianechoic room environment Train leakage part position |
| CN109660916A (en) * | 2018-12-18 | 2019-04-19 | 安徽江淮汽车集团股份有限公司 | A method of optimization internal car noise acoustics packet |
| CN109671441A (en) * | 2018-12-20 | 2019-04-23 | 重庆长安汽车股份有限公司 | The method for identifying speech articulation frequency band contribution amount |
| CN110174166A (en) * | 2019-05-05 | 2019-08-27 | 奇瑞汽车股份有限公司 | A kind of pure electric vehicle acoustics packet design method |
| CN111006883A (en) * | 2019-12-31 | 2020-04-14 | 重庆长安汽车股份有限公司 | Automobile air sound insulation weakness optimization method |
| CN111024407A (en) * | 2019-12-18 | 2020-04-17 | 中国汽车工程研究院股份有限公司 | Analysis method for automobile sound insulation weak position based on sound transmission test |
| CN112254978A (en) * | 2020-09-09 | 2021-01-22 | 交通运输部公路科学研究所 | Method for measuring and evaluating passing noise source intensity and directivity of vehicle |
| CN113987673A (en) * | 2021-10-15 | 2022-01-28 | 重庆长安汽车股份有限公司 | Method for predicting sound insulation performance of vehicle body system based on series-parallel equivalent theoretical model |
| CN116359349A (en) * | 2023-05-19 | 2023-06-30 | 江铃汽车股份有限公司 | Method and system for evaluating sound absorption and noise reduction capabilities of automotive interior trim parts |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562772A (en) * | 2009-03-19 | 2009-10-21 | 南京大学 | Method for designing whole acoustic structure of micro-telephone receiver |
| CN204228665U (en) * | 2014-09-02 | 2015-03-25 | 中原工学院 | Fabric sound-adsorbing sound-insulating hung proving installation |
| CN105300706A (en) * | 2015-10-22 | 2016-02-03 | 华晨汽车集团控股有限公司 | NVH performance test method for automobile acoustic package |
| CN105323666A (en) * | 2014-07-11 | 2016-02-10 | 中国科学院声学研究所 | Calculation method of external ear sound signal transfer function and application |
| CN105519135A (en) * | 2013-09-09 | 2016-04-20 | 中石真一路 | Speaker for supporting hearing-impaired people |
| CN205748625U (en) * | 2016-05-03 | 2016-11-30 | 中国科学院声学研究所 | A kind of single end face reciprocity device for the test of underwater sound low-frequency sound source |
-
2016
- 2016-12-30 CN CN201611252481.0A patent/CN108267321A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562772A (en) * | 2009-03-19 | 2009-10-21 | 南京大学 | Method for designing whole acoustic structure of micro-telephone receiver |
| CN105519135A (en) * | 2013-09-09 | 2016-04-20 | 中石真一路 | Speaker for supporting hearing-impaired people |
| CN105323666A (en) * | 2014-07-11 | 2016-02-10 | 中国科学院声学研究所 | Calculation method of external ear sound signal transfer function and application |
| CN204228665U (en) * | 2014-09-02 | 2015-03-25 | 中原工学院 | Fabric sound-adsorbing sound-insulating hung proving installation |
| CN105300706A (en) * | 2015-10-22 | 2016-02-03 | 华晨汽车集团控股有限公司 | NVH performance test method for automobile acoustic package |
| CN205748625U (en) * | 2016-05-03 | 2016-11-30 | 中国科学院声学研究所 | A kind of single end face reciprocity device for the test of underwater sound low-frequency sound source |
Non-Patent Citations (2)
| Title |
|---|
| 苑春苗 等: "《噪声控制原理与技术》", 30 December 2014 * |
| 谢晓龙 等: ""一种基于声功率的整车降噪试验方法"", 《泛亚汽车技术中心有限公司》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211588A (en) * | 2018-09-27 | 2019-01-15 | 安徽江淮汽车集团股份有限公司 | A kind of test method of front wall sound insulation set group vulnerability analysis |
| CN109307608A (en) * | 2018-11-28 | 2019-02-05 | 中车长春轨道客车股份有限公司 | The plugging repair method of vehicle semianechoic room environment Train leakage part position |
| CN109307608B (en) * | 2018-11-28 | 2020-11-10 | 中车长春轨道客车股份有限公司 | Method for plugging and repairing train sound leakage part in whole vehicle semi-anechoic chamber environment |
| CN109660916B (en) * | 2018-12-18 | 2020-06-23 | 安徽江淮汽车集团股份有限公司 | Method for optimizing noise acoustic package in vehicle |
| CN109660916A (en) * | 2018-12-18 | 2019-04-19 | 安徽江淮汽车集团股份有限公司 | A method of optimization internal car noise acoustics packet |
| CN109671441A (en) * | 2018-12-20 | 2019-04-23 | 重庆长安汽车股份有限公司 | The method for identifying speech articulation frequency band contribution amount |
| CN109671441B (en) * | 2018-12-20 | 2022-11-04 | 重庆长安汽车股份有限公司 | Method for identifying speech intelligibility band contribution |
| CN110174166A (en) * | 2019-05-05 | 2019-08-27 | 奇瑞汽车股份有限公司 | A kind of pure electric vehicle acoustics packet design method |
| CN110174166B (en) * | 2019-05-05 | 2021-12-28 | 奇瑞汽车股份有限公司 | Pure electric vehicle acoustic package design method |
| CN111024407A (en) * | 2019-12-18 | 2020-04-17 | 中国汽车工程研究院股份有限公司 | Analysis method for automobile sound insulation weak position based on sound transmission test |
| CN111006883A (en) * | 2019-12-31 | 2020-04-14 | 重庆长安汽车股份有限公司 | Automobile air sound insulation weakness optimization method |
| CN112254978A (en) * | 2020-09-09 | 2021-01-22 | 交通运输部公路科学研究所 | Method for measuring and evaluating passing noise source intensity and directivity of vehicle |
| CN112254978B (en) * | 2020-09-09 | 2022-05-17 | 交通运输部公路科学研究所 | Method for measuring and evaluating passing noise source intensity and directivity of vehicle |
| CN113987673A (en) * | 2021-10-15 | 2022-01-28 | 重庆长安汽车股份有限公司 | Method for predicting sound insulation performance of vehicle body system based on series-parallel equivalent theoretical model |
| CN113987673B (en) * | 2021-10-15 | 2022-09-06 | 重庆长安汽车股份有限公司 | Method for predicting sound insulation performance of vehicle body system based on series-parallel equivalent theoretical model |
| CN116359349A (en) * | 2023-05-19 | 2023-06-30 | 江铃汽车股份有限公司 | Method and system for evaluating sound absorption and noise reduction capabilities of automotive interior trim parts |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108267321A (en) | A kind of test and evaluation method of car acpistocs packaging sound absorption performance | |
| CN105300706A (en) | NVH performance test method for automobile acoustic package | |
| CN106886015B (en) | A kind of detection means and detection method of multibeam sonar primary acoustic index | |
| CN102089633B (en) | Method for reconstructing an acoustic field | |
| CN107195294B (en) | Active noise reduction method and device for vehicle | |
| CN106383035A (en) | Muffler transmission loss testing system and muffler transmission loss testing method for aiming at aerodynamic noise | |
| EP3011286A1 (en) | Method of determining noise sound contributions of noise sources of a motorized vehicle | |
| CN103344934B (en) | The detection check method and system of Partial Discharge in Power Transformer sonac | |
| Ginn et al. | Noise source identification techniques: simple to advanced applications | |
| CN106680376A (en) | Sound insulation measurement system and measurement method based on three-dimensional sound intensity array | |
| CN110049424B (en) | Microphone array wireless calibration method based on GIL fault sound detection | |
| WO2022062907A1 (en) | Method and system for identifying noise source in rail vehicle | |
| CN110703150A (en) | Transformer internal fault detection and positioning method based on acoustic-vibration coupling signals | |
| CN104374532A (en) | Spacecraft ontrack leakage orientation method | |
| CN106940384A (en) | A kind of mining ultrasonic aerovane and its wind detection method | |
| CN108122560A (en) | A kind of system and method for extracting engine noise tone degree | |
| CN106872018B (en) | Acoustic matrix array apparatus for vehicle testing tire noise power grade | |
| CN109307608B (en) | Method for plugging and repairing train sound leakage part in whole vehicle semi-anechoic chamber environment | |
| CN201716162U (en) | Acoustics sealing detector of vehicle | |
| CN103115966A (en) | Device and method for measuring sound reduction index of acoustic material by adopting pulse method | |
| CN113588071B (en) | Method for analyzing noise contribution | |
| CN108931296A (en) | Automobile relief valve noise grade test experience equipment, detection system and detection method | |
| CN105928666A (en) | Leakage acoustic characteristic extraction method based on Hilbert-Huang transform and blind source separation | |
| CN206270056U (en) | A kind of silencer transmission loss test system for aerodynamic noise | |
| CN108535018A (en) | A kind of internal combustion engine exhaust silencer case noise radiation test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180710 |