CN114755022A - Method and device for testing vehicle single-value sound insulation quantity and readable storage medium - Google Patents
Method and device for testing vehicle single-value sound insulation quantity and readable storage medium Download PDFInfo
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Abstract
The invention discloses a method, a device and a readable storage medium for testing the single-value sound insulation quantity of a vehicle, wherein the method comprises the steps of determining corresponding noise attenuation quantity according to the acquired in-vehicle noise sound pressure level and the acquired out-vehicle noise sound pressure level of the noise sound source with each frequency in a preset frequency range, carrying out weighting operation on the noise attenuation quantity of the noise sound source with each frequency in the preset frequency range to obtain the single-value sound insulation quantity of the vehicle, and introducing the noise attenuation quantity of the noise sound source with different frequencies into the calculation of the single-value sound insulation quantity of the vehicle according to different weighting considerations so as to consider the sensitivity of people to different frequencies, so that the sound insulation performance of the vehicle can be evaluated more fully, and technical support is provided for the development of an acoustic package of the whole vehicle.
Description
Technical Field
The invention relates to the technical field of vehicle sound insulation, in particular to a method and a device for testing vehicle single-value sound insulation and a readable storage medium.
Background
The sound insulation performance of a vehicle is an important evaluation index for measuring the comfort of the vehicle, the sound insulation quantity is an index for objectively measuring the sound insulation performance, a common index for measuring the sound insulation performance in the automobile industry is NR (evaluating a certain part of the whole vehicle), the sound insulation quantity of the whole vehicle (measuring the whole vehicle) is an octave curve (200 plus 6300Hz) which is one third of the sound insulation performance along with the frequency change, however, for a specific vehicle, the sound insulation performance of certain frequency bands is good, the sound insulation performance of certain frequency bands is poor, if the sound insulation performance of the vehicle is evaluated by adopting the sound insulation curve, the sound insulation performance of the vehicle can only be analyzed according to the sound insulation performance of the specific frequency bands, and the sound insulation performance of the vehicle cannot be evaluated definitely. For this reason, a single-valued sound insulation amount is introduced to give the evaluation result of the comprehensive sound insulation performance of the vehicle.
In the prior art, the following single-value sound insulation quantity calculation methods are mainly available in the automobile industry:
1. arithmetic mean method: for the calculation method of the single-value sound insulation quantity, CAC-PV 18-029: the 2020CN95 low-noise sound insulation cabin authentication implementation rule is specified to be within a frequency range of 200-6300Hz, and an arithmetic average value of sound insulation quantity corresponding to each frequency of a 1/3 octave sound insulation curve is taken.
2. Equivalent area method: in the CCARI-GZ-28-2020 automobile low-noise sound insulation cockpit certification implementation rule frequency range, the absolute value of the difference value of the sound pressure level at the frequency range center frequency which is one third times of the noise of the sound source outside the automobile and the noise inside the automobile is used as the total sound insulation amount. And calculating the ratio A of the envelope area S of the total sound insulation curve to 1000 for the standard sound insulation performance of the whole vehicle.
However, in the process of implementing the invention, the inventor finds that neither the sound insulation arithmetic mean method nor the equivalent area method considers the sensitivity of people to different frequencies, and has certain limitation, so that the sound insulation performance of the vehicle cannot be fully evaluated.
Disclosure of Invention
The embodiment of the invention provides a method and a device for testing the single-value sound insulation quantity of a vehicle and a readable storage medium, which can solve the problem that the sound insulation performance of the vehicle cannot be fully evaluated in the prior art.
An embodiment of the invention provides a method for testing a vehicle single-value sound insulation quantity, which comprises the following steps:
acquiring the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle, which are tested under the noise sound source with each frequency in the preset frequency range;
determining noise attenuation under noise sound sources of various frequencies in a preset frequency range according to the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle;
and carrying out weighted operation on the noise attenuation amount under the noise source of each frequency in the preset frequency range to obtain the single-value sound insulation amount of the vehicle.
As an improvement of the above scheme, if the noise sound source is disposed in the vehicle, the acquiring of the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle, which are tested under the noise sound source of each frequency in the preset frequency range, specifically includes:
acquiring sound pressure levels acquired by first microphones under noise sources of all frequencies in a preset frequency range to obtain the sound pressure levels of noise in a vehicle tested under the noise sources of all frequencies in the preset frequency range, wherein the first microphones are arranged in the vehicle;
acquiring the sound pressure level collected by a second microphone under the noise sound source of each frequency in the preset frequency range, and obtaining the sound pressure level of the noise outside the vehicle tested under the noise sound source of each frequency in the preset frequency range, wherein the second microphone is arranged outside the vehicle.
As an improvement of the above scheme, the determining, according to the sound pressure level of the in-vehicle noise and the sound pressure level of the out-vehicle noise, a noise attenuation amount under a noise source of each frequency in a preset frequency range specifically includes:
and taking the absolute value of the difference between the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle as the noise attenuation amount under the noise source of each frequency in a preset frequency range.
As an improvement of the above scheme, the performing a weighted operation on the noise attenuation amounts under the noise sources of each frequency in the preset frequency range to obtain a single-value sound insulation amount of the vehicle specifically includes:
determining a frequency weight coefficient corresponding to each frequency in a preset frequency range according to a mapping relation between each frequency in the preset frequency range and the frequency weight coefficient; wherein the mapping relation between each frequency in the preset frequency range and the frequency weight coefficient is determined according to a voice definition weighting table;
and summing products of the noise attenuation amount under the noise source of each frequency in the preset frequency range and the corresponding frequency weight coefficient to obtain the single-value sound insulation amount of the vehicle.
Another embodiment of the present invention correspondingly provides a device for testing a single-valued sound insulation amount of a vehicle, including:
The sound pressure level acquisition module is used for acquiring the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle, which are tested under the noise sound source of each frequency in the preset frequency range;
the attenuation amount determining module is used for determining noise attenuation amounts under noise sound sources of all frequencies in a preset frequency range according to the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle;
and the sound insulation amount calculation module is used for performing weighted operation on the noise attenuation amount under the noise source of each frequency in the preset frequency range to obtain the single-value sound insulation amount of the vehicle.
As an improvement of the above scheme, the sound pressure level obtaining module specifically includes:
the device comprises an in-vehicle sound pressure level acquisition unit, a sound pressure level acquisition unit and a sound pressure level acquisition unit, wherein the in-vehicle sound pressure level acquisition unit is used for acquiring the sound pressure level acquired by a first microphone under the noise sound source of each frequency in a preset frequency range to obtain the in-vehicle noise sound pressure level tested under the noise sound source of each frequency in the preset frequency range, and the noise sound source is arranged in the vehicle; the first microphone is arranged in the vehicle;
the system comprises an outside vehicle sound pressure level acquisition unit, a sound pressure level acquisition unit and a sound pressure level acquisition unit, wherein the outside vehicle sound pressure level acquisition unit is used for acquiring the sound pressure level acquired by a second microphone under the noise sound source of each frequency in a preset frequency range to obtain the outside vehicle noise sound pressure level tested under the noise sound source of each frequency in the preset frequency range, and the noise sound source is arranged in the vehicle; the second microphone is arranged outside the vehicle.
As an improvement of the above solution, the attenuation amount determining module is specifically configured to use an absolute value of a difference between the sound pressure level of the in-vehicle noise and the sound pressure level of the out-vehicle noise as a noise attenuation amount for a noise sound source of each frequency in a preset frequency range.
As an improvement of the above scheme, the sound insulation amount calculation module specifically includes:
the frequency weight coefficient determining unit is used for determining the frequency weight coefficient corresponding to each frequency in the preset frequency range according to the mapping relation between each frequency in the preset frequency range and the frequency weight coefficient; the mapping relation between each frequency in the preset frequency range and the frequency weight coefficient is determined according to a voice definition weighting table;
and the sound insulation amount calculation unit is used for summing the products of the noise attenuation amount of the noise sound source with each frequency in the preset frequency range and the corresponding frequency weight coefficient to obtain the single-value sound insulation amount of the vehicle.
Another embodiment of the present invention provides a readable storage medium, where the readable storage medium includes a stored computer program, where when the computer program runs, a device where the readable storage medium is located is controlled to execute the method for testing the vehicle single-valued acoustic insulation amount according to the above embodiment of the present invention.
Compared with the prior art, the method for testing the vehicle single-value sound insulation quantity provided by the embodiment of the invention comprises the steps of determining the corresponding noise attenuation quantity according to the acquired in-vehicle noise sound pressure level and the acquired out-vehicle noise sound pressure level of the noise sound source with each frequency in the preset frequency range, carrying out weighting operation on the noise attenuation quantity of the noise sound source with each frequency in the preset frequency range to obtain the single-value sound insulation quantity of the vehicle, and introducing the noise attenuation quantities of the noise sound sources with different frequencies into the calculation of the sound insulation quantity of the vehicle according to different weighting considerations so as to consider the sensitivity degree of people to different frequencies and more fully evaluate the sound insulation performance of the vehicle. Meanwhile, the embodiment of the invention also correspondingly provides a device for testing the vehicle single-value sound insulation and a readable storage medium.
Drawings
Fig. 1 is a schematic flow chart of a method for testing a single-valued sound insulation of a vehicle according to an embodiment of the present invention;
fig. 2 is a block diagram of a structure of a device for testing a single-valued sound insulation amount of a vehicle according to an embodiment of the present invention;
FIG. 3 is a sound insulation curve chart obtained by plotting noise attenuation of a vehicle according to the method for testing the single-value sound insulation of the vehicle provided by the embodiment of the invention;
FIG. 4 is a comparison graph of sound insulation curves of 10 vehicles obtained by plotting noise attenuation of 10 vehicles according to the test method for single-value sound insulation of vehicles provided by the embodiment of the invention;
fig. 5 is a comparison graph of the individual value sound insulation of 10 vehicles according to the method for testing the individual value sound insulation of the vehicle according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring to fig. 1, it is a schematic flow chart of a method for testing a vehicle single-valued sound insulation according to an embodiment of the present invention.
The method for testing the vehicle single-value sound insulation quantity comprises the following steps:
step S1, acquiring the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle, which are tested under the noise source of each frequency in the preset frequency range;
Step S2, determining noise attenuation under noise sources of each frequency in a preset frequency range according to the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle;
in step S3, the noise attenuation amounts of the noise sources at the respective frequencies in the preset frequency range are weighted to obtain a singular value sound insulation amount of the vehicle.
The method for testing the vehicle single-value sound insulation quantity comprises the steps of determining corresponding noise attenuation quantity according to the obtained vehicle interior noise sound pressure level and the vehicle exterior noise sound pressure level of the noise sound source with each frequency in the preset frequency range, conducting weighting operation on the noise attenuation quantity of the noise sound source with each frequency in the preset frequency range to obtain the vehicle single-value sound insulation quantity, and introducing the noise attenuation quantity of the noise sound source with different frequencies into the vehicle single-value sound insulation quantity calculation according to different weighting considerations to consider the sensitivity degree of people to different frequencies, so that the sound insulation performance of a vehicle can be evaluated more fully.
In an optional embodiment, the step S1 "acquiring the sound pressure level of the vehicle interior noise and the sound pressure level of the vehicle exterior noise tested under the noise sound source of each frequency in the preset frequency range" specifically includes:
Acquiring sound pressure levels acquired by first microphones under noise sound sources of all frequencies in a preset frequency range to obtain the sound pressure levels of noise in a vehicle tested under the noise sound sources of all frequencies in the preset frequency range, wherein the first microphones are arranged in the vehicle;
acquiring the sound pressure level acquired by a second microphone under the noise sound source of each frequency in a preset frequency range, and acquiring the sound pressure level of the noise outside the vehicle tested under the noise sound source of each frequency in the preset frequency range, wherein the second microphone is arranged outside the vehicle.
In particular implementations, the noise source may be placed at the right ear of the driver (e.g., at the position of the driver's right ear headrest) and at a distance from the noise source according to the principle of reciprocityA first microphone is placed at a certain distance (for example, at a distance of 10 cm) from a sound source for testing, and the frequency of the noise sound source is changed to obtain the sound pressure level P of the noise in the vehicle under the environment of the noise sound source with different frequenciesin(i) (ii) a The response is tested at an offboard component (which may be, for example, a cabin, a wheel cover, a floor, or an exhaust), and a second microphone is placed at a distance (for example, at a distance of 10 cm) from the surface of the offboard component to obtain an offboard noise sound pressure level P in the environment of noise sources of different frequencies out(i)。
In an optional embodiment, the step S2 "determining the noise attenuation amount under the noise sound source of each frequency in the preset frequency range according to the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle" specifically includes:
and taking the absolute value of the difference between the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle as the noise attenuation amount under the noise sound source of each frequency in a preset frequency range.
When embodied, it can be according to the formula NRi＝Pin(i)-Pout(i) Obtaining noise attenuation amounts NR under noise sources of respective frequencies in a preset frequency rangeiWherein i in the formula represents the ith frequency in the preset frequency range.
Referring to fig. 3, fig. 3 is a sound insulation curve graph of a certain vehicle obtained by plotting the noise attenuation obtained by the above method, and it can be seen that if a sound insulation curve is used to evaluate the sound insulation performance of the vehicle, since there are cases where the sound insulation performance of a certain frequency band is good and there are cases where the sound insulation performance of a certain frequency band is poor, a comprehensive evaluation result cannot be given, and thus, a single-valued sound insulation quantity is introduced to avoid the above-mentioned situation.
However, the single-value sound insulation amount calculation methods (such as a sound insulation amount arithmetic mean method and an equivalent area method) in the prior art do not consider the sensitivity of people to different frequencies, so that the sound insulation performance of the vehicle cannot be fully evaluated.
In order to overcome the above-mentioned drawbacks, the embodiment of the present invention fully considers the sensitivity of a person to different frequencies, and specifically, the step S3 "performing a weighted operation on noise attenuation amounts under noise sources of respective frequencies in a preset frequency range to obtain a single-valued sound insulation amount of a vehicle" specifically includes:
determining a frequency weight coefficient corresponding to each frequency in a preset frequency range according to a mapping relation between each frequency in the preset frequency range and the frequency weight coefficient; the mapping relation between each frequency in the preset frequency range and the frequency weight coefficient is determined according to a voice definition weighting table;
and summing products of the noise attenuation amount under the noise source of each frequency in the preset frequency range and the corresponding frequency weight coefficient to obtain the single-value sound insulation amount of the vehicle.
Specifically, the speech intelligibility weighting table is shown in table 1:
TABLE 1
| |
200 | 250 | 315 | 400 | 500 | 630 | 800 | 1000 | 1250 | 1600 | 2000 | 2500 | 3150 | 4000 | 5000 | 6300 |
| qi | 0.01 | 0.02 | 0.0325 | 0.0425 | 0.045 | 0.0525 | 0.065 | 0.0725 | 0.085 | 0.115 | 0.11 | 0.095 | 0.09 | 0.0775 | 0.0625 | 0.025 |
In a specific application, the frequency weight coefficient q corresponding to each frequency can be obtained from table 1iAnd according toFormula (II)
And performing operation to obtain the single-value sound insulation quantity of the vehicle, wherein i in the formula represents the ith frequency in the preset frequency range.
In practical implementation, as shown in fig. 4, by testing 10 vehicles (testing the sound pressure level outside the noise vehicle at the same vehicle-exterior part of the 10 vehicles in all the tests) by using the method, the sound insulation curves of 10 sound insulation curves shown in fig. 4 can be drawn according to the noise attenuation amounts of the noise sound sources with different frequencies obtained by the tests. It can be seen that if the sound insulation performance of a plurality of vehicles is compared through a sound insulation curve, the presentation effect of the comparison is poor, and a single-value sound insulation quantity comparison graph of 10 corresponding vehicles can be further drawn according to the single-value sound insulation quantity of the vehicles obtained after the weighted operation of the noise attenuation quantities under the noise sound sources with different frequencies as shown in fig. 5, and the sound insulation performance of the plurality of vehicles can be visually compared through fig. 5.
In the embodiment of the invention, the frequency range (200-6300Hz) of the evaluation sound insulation amount is considered to be the same as the calculation frequency range of the speech intelligibility index (AI), so that the sensitivity of people to different frequencies is fully considered by introducing the frequency weight coefficient into the calculation of the vehicle single-value sound insulation amount, and the objective value of the obtained vehicle single-value sound insulation amount can be more consistent with the subjective evaluation result.
As shown in fig. 2, the present invention also provides a device for testing a vehicle single-valued sound insulation amount, and the device 100 for testing a vehicle single-valued sound insulation amount according to the embodiment of the present invention includes:
the sound pressure level acquisition module 1 is used for acquiring the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle, which are tested under the noise sound source of each frequency in the preset frequency range;
the attenuation amount determining module 2 is used for determining noise attenuation amounts under noise sound sources of all frequencies in a preset frequency range according to the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle;
and the sound insulation amount calculation module 3 is used for performing weighting operation on the noise attenuation amount under the noise sound source of each frequency in the preset frequency range to obtain the single-value sound insulation amount of the vehicle.
In an optional implementation manner, the sound pressure level obtaining module 1 specifically includes:
The device comprises an in-vehicle sound pressure level acquisition unit, a sound pressure level acquisition unit and a sound pressure level acquisition unit, wherein the in-vehicle sound pressure level acquisition unit is used for acquiring the sound pressure level acquired by a first microphone under the noise sound source of each frequency in a preset frequency range to obtain the in-vehicle noise sound pressure level tested under the noise sound source of each frequency in the preset frequency range, and the noise sound source is arranged in the vehicle; the first microphone is arranged in the vehicle;
the system comprises an outside vehicle sound pressure level acquisition unit, a sound pressure level acquisition unit and a sound pressure level acquisition unit, wherein the outside vehicle sound pressure level acquisition unit is used for acquiring the sound pressure level acquired by a second microphone under the noise sound source of each frequency in a preset frequency range to obtain the outside vehicle noise sound pressure level tested under the noise sound source of each frequency in the preset frequency range, and the noise sound source is arranged in the vehicle; the second microphone is arranged outside the vehicle.
In specific implementation, according to the principle of reciprocity, a noise sound source may be placed at the right ear of the driver (for example, at the position of the headrest at the right ear of the driver), a first microphone may be placed at a distance (for example, at a distance of 10 cm) from the noise sound source for testing, and the frequency of the noise sound source may be changed to obtain the sound pressure level P of the in-vehicle noise in the environment of the noise sound source with different frequenciesin(i) (ii) a The response is tested at an offboard component (which may be, for example, a cabin, a wheel cover, a floor or an exhaust), and a second microphone is placed at a distance (for example, at a distance of 10 cm) from the surface of the offboard component for testing, resulting in an offboard noise sound pressure level P in the environment of noise sources of different frequencies out(i)。
In an optional embodiment, the attenuation amount determining module 2 is specifically configured to use an absolute value of a difference between the sound pressure level of the in-vehicle noise and the sound pressure level of the out-vehicle noise as a noise attenuation amount for a noise sound source of each frequency in a preset frequency range.
When embodied, it can be according to the formula NRi＝Pin(i)-Pout(i) Obtained in a predetermined frequency rangeNoise attenuation amount NR at noise source of each frequencyiWherein, i in the formula represents the ith frequency in the preset frequency range.
Referring to fig. 3, fig. 3 is a sound insulation curve graph of a certain vehicle obtained by plotting the noise attenuation obtained by the above method, and it can be seen that if the sound insulation performance of the vehicle is evaluated from the sound insulation curve, since the sound insulation performance of a certain frequency band is good and the sound insulation performance of a certain frequency band is poor, a comprehensive evaluation result cannot be given, and thus, a single-value sound insulation amount is introduced to avoid the above situation.
However, the single-value sound insulation amount calculation methods (such as the sound insulation amount arithmetic mean method and the equivalent area method) in the prior art do not consider the sensitivity of people to different frequencies, so that the sound insulation performance of the vehicle cannot be fully evaluated.
In order to overcome the above drawback, the embodiment of the present invention fully considers the sensitivity of a person to different frequencies, and specifically, the sound insulation amount calculating module 3 specifically includes:
the frequency weight coefficient determining unit is used for determining the frequency weight coefficient corresponding to each frequency in the preset frequency range according to the mapping relation between each frequency in the preset frequency range and the frequency weight coefficient; the mapping relation between each frequency in the preset frequency range and the frequency weight coefficient is determined according to a voice definition weighting table;
and the sound insulation amount calculation unit is used for summing the products of the noise attenuation amount and the corresponding frequency weight coefficient under each frequency in the preset frequency range of the noise sound source to obtain the single-value sound insulation amount of the vehicle.
Specifically, the speech intelligibility weighting table is shown in table 1:
TABLE 1
In a specific application, the frequency weight coefficient q corresponding to each frequency can be obtained from table 1iAnd according to the formula
And performing operation to obtain the single-value sound insulation quantity of the vehicle, wherein i in the formula represents the ith frequency in the preset frequency range.
In practical implementation, as shown in fig. 4, by testing 10 vehicles (in the test, the sound pressure level outside the vehicle is tested at the same outside part of the 10 vehicles), the sound insulation curves of 10 pieces shown in fig. 4 can be drawn according to the noise attenuation amounts of the noise sources with different frequencies obtained by the test. It can be seen that if the sound insulation performance of a plurality of vehicles is compared through a sound insulation curve, the presenting effect of the comparison is poor, and a sound insulation comparison graph of 10 corresponding vehicles can be further drawn according to the single-value sound insulation quantity of the vehicle obtained after the weighted operation of the noise attenuation quantities under the noise sound sources with different frequencies as shown in fig. 5, and the sound insulation performance of the plurality of vehicles can be compared visually through fig. 5.
In the embodiment of the invention, the frequency range (200-.
The present invention also provides a readable storage medium, which includes a stored computer program, wherein when the computer program runs, a device on which the computer readable storage medium is located is controlled to execute the above steps S1 to S3 of the above embodiment of the present invention.
The computer-readable storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (9)
1. A method for testing the single-value sound insulation quantity of a vehicle is characterized by comprising the following steps:
acquiring the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle, which are tested under the noise sound source with each frequency in the preset frequency range;
determining noise attenuation under noise sound sources of various frequencies in a preset frequency range according to the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle;
and carrying out weighted operation on the noise attenuation amount under the noise source of each frequency in the preset frequency range to obtain the single-value sound insulation amount of the vehicle.
2. The method for testing the vehicle unique value sound insulation amount according to claim 1, wherein the noise sound source is disposed in a vehicle, and the obtaining of the in-vehicle noise sound pressure level and the out-vehicle noise sound pressure level tested under the noise sound source of each frequency in the preset frequency range specifically includes:
acquiring sound pressure levels acquired by first microphones under noise sources of all frequencies in a preset frequency range to obtain the sound pressure levels of noise in a vehicle tested under the noise sources of all frequencies in the preset frequency range, wherein the first microphones are arranged in the vehicle;
acquiring the sound pressure level collected by a second microphone under the noise sound source of each frequency in the preset frequency range, and obtaining the sound pressure level of the noise outside the vehicle tested under the noise sound source of each frequency in the preset frequency range, wherein the second microphone is arranged outside the vehicle.
3. The method for testing the vehicle unique value sound insulation amount according to claim 1, wherein the determining the noise attenuation amount under the noise sound source of each frequency in a preset frequency range according to the in-vehicle noise sound pressure level and the out-vehicle noise sound pressure level specifically comprises:
and taking the absolute value of the difference between the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle as the noise attenuation amount under the noise source of each frequency in a preset frequency range.
4. The method for testing the vehicle unique value sound insulation quantity according to any one of claims 1 to 3, wherein the weighting operation is performed on the noise attenuation quantity under the noise source of each frequency in the preset frequency range to obtain the vehicle unique value sound insulation quantity, and specifically comprises:
determining a frequency weight coefficient corresponding to each frequency in a preset frequency range according to a mapping relation between each frequency in the preset frequency range and the frequency weight coefficient; the mapping relation between each frequency in the preset frequency range and the frequency weight coefficient is determined according to a voice definition weighting table;
and summing products of the noise attenuation amount under the noise source of each frequency in the preset frequency range and the corresponding frequency weight coefficient to obtain the single-value sound insulation amount of the vehicle.
5. A vehicle single-value sound insulation testing device is characterized by comprising:
the sound pressure level acquisition module is used for acquiring the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle, which are tested under the noise sound source of each frequency in the preset frequency range;
the attenuation amount determining module is used for determining noise attenuation amounts under noise sound sources of all frequencies in a preset frequency range according to the sound pressure level of the noise inside the vehicle and the sound pressure level of the noise outside the vehicle;
and the sound insulation amount calculation module is used for performing weighted operation on the noise attenuation amount under the noise source of each frequency in the preset frequency range to obtain the single-value sound insulation amount of the vehicle.
6. The vehicle single-valued sound insulation testing device according to claim 5, wherein said sound pressure level obtaining module specifically comprises:
the device comprises an in-vehicle sound pressure level acquisition unit, a sound pressure level acquisition unit and a sound pressure level acquisition unit, wherein the in-vehicle sound pressure level acquisition unit is used for acquiring the sound pressure level acquired by a first microphone under the noise sound source of each frequency in a preset frequency range to obtain the in-vehicle noise sound pressure level tested under the noise sound source of each frequency in the preset frequency range, and the noise sound source is arranged in a vehicle; the first microphone is arranged in the vehicle;
the device comprises an outside-vehicle sound pressure level acquisition unit, a sound pressure level acquisition unit and a sound pressure level acquisition unit, wherein the outside-vehicle sound pressure level acquisition unit is used for acquiring the sound pressure level acquired by a second microphone under the noise sound source of each frequency in a preset frequency range to obtain the outside-vehicle noise sound pressure level tested under the noise sound source of each frequency in the preset frequency range, and the noise sound source is arranged in a vehicle; the second microphone is arranged outside the vehicle.
7. The apparatus for testing vehicle unique value sound insulation according to claim 5, wherein the attenuation amount determining module is specifically configured to use an absolute value of a difference between the inside noise sound pressure level and the outside noise sound pressure level as the noise attenuation amount at the noise sound source of each frequency in a preset frequency range.
8. The vehicle single-value sound insulation testing device according to any one of claims 5 to 7, wherein the sound insulation calculation module specifically comprises:
the frequency weight coefficient determining unit is used for determining the frequency weight coefficient corresponding to each frequency in the preset frequency range according to the mapping relation between each frequency in the preset frequency range and the frequency weight coefficient; the mapping relation between each frequency in the preset frequency range and the frequency weight coefficient is determined according to a voice definition weighting table;
and the sound insulation amount calculation unit is used for summing the products of the noise attenuation amount of the noise sound source with each frequency in the preset frequency range and the corresponding frequency weight coefficient to obtain the single-value sound insulation amount of the vehicle.
9. A readable storage medium, characterized in that the readable storage medium comprises a stored computer program, wherein when the computer program runs, the readable storage medium is controlled to execute the vehicle single-value sound insulation amount testing method according to any one of claims 1 to 4.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007263691A (en) * | 2006-03-28 | 2007-10-11 | Isuzu Motors Ltd | Sound pressure estimation method |
| CN102272624A (en) * | 2009-07-02 | 2011-12-07 | 松下电器产业株式会社 | Vehicle position detecting device and vehicle position detecting method |
| CN103115666A (en) * | 2012-07-03 | 2013-05-22 | 重庆长安汽车股份有限公司 | Method of testing and evaluating sound insulation property of finished automobile based on reverberation room |
| CN103698403A (en) * | 2013-12-16 | 2014-04-02 | 同济大学 | Measuring method and measuring device for sound insulation quantities of material and members |
| CN104062075A (en) * | 2014-07-04 | 2014-09-24 | 奇瑞汽车股份有限公司 | Finished automobile sound transmission loss testing method |
| KR101813444B1 (en) * | 2017-02-15 | 2017-12-28 | 인하대학교 산학협력단 | Method of quantifying combustion noise using time-frequency masking and apparatus thereof |
| CN109342571A (en) * | 2018-11-23 | 2019-02-15 | 中国电力科学研究院有限公司 | Acoustic hood anti-acoustic capability test 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 |
| CN111143962A (en) * | 2019-11-12 | 2020-05-12 | 西南交通大学 | Sound insulation evaluation method and device |
-
2021
- 2021-01-08 CN CN202110024000.5A patent/CN114755022A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007263691A (en) * | 2006-03-28 | 2007-10-11 | Isuzu Motors Ltd | Sound pressure estimation method |
| CN102272624A (en) * | 2009-07-02 | 2011-12-07 | 松下电器产业株式会社 | Vehicle position detecting device and vehicle position detecting method |
| CN103115666A (en) * | 2012-07-03 | 2013-05-22 | 重庆长安汽车股份有限公司 | Method of testing and evaluating sound insulation property of finished automobile based on reverberation room |
| CN103698403A (en) * | 2013-12-16 | 2014-04-02 | 同济大学 | Measuring method and measuring device for sound insulation quantities of material and members |
| CN104062075A (en) * | 2014-07-04 | 2014-09-24 | 奇瑞汽车股份有限公司 | Finished automobile sound transmission loss testing method |
| KR101813444B1 (en) * | 2017-02-15 | 2017-12-28 | 인하대학교 산학협력단 | Method of quantifying combustion noise using time-frequency masking and apparatus thereof |
| CN109342571A (en) * | 2018-11-23 | 2019-02-15 | 中国电力科学研究院有限公司 | Acoustic hood anti-acoustic capability test method |
| CN111143962A (en) * | 2019-11-12 | 2020-05-12 | 西南交通大学 | Sound insulation evaluation method and device |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 王家豪 等: ""白车身气密性设计"", 《机电工程技术》, vol. 48, no. 07, 20 July 2019 (2019-07-20), pages 59 - 62 * |
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