CN112019973A - Sound adjusting method and sound adjusting device for executing the method - Google Patents
Sound adjusting method and sound adjusting device for executing the method Download PDFInfo
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- CN112019973A CN112019973A CN201910465125.4A CN201910465125A CN112019973A CN 112019973 A CN112019973 A CN 112019973A CN 201910465125 A CN201910465125 A CN 201910465125A CN 112019973 A CN112019973 A CN 112019973A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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Abstract
A sound adjusting method and a sound adjusting device for executing the method are provided, the sound adjusting method comprises the following steps: obtaining a sound signal, wherein the sound signal comprises a plurality of frequency bands, and each frequency band has a corresponding original sound pressure level value; respectively converting the original sound pressure level values of all frequency bands into corresponding loudness level values; adjusting each loudness level value by a preset loudness level value to obtain the adjusted loudness level value of each frequency band; converting each adjusted loudness level value into corresponding adjusted loudness level values respectively; calculating and obtaining target sound pressure level values of all frequency bands according to the original sound pressure level values of all frequency bands and the adjusted sound pressure level values; adjusting the original sound pressure level value of each frequency band to each target sound pressure level value to obtain an adjusted sound signal; outputting the adjusted sound signal.
Description
Technical Field
The present invention relates to a sound adjusting method and a sound adjusting apparatus for performing the same, and more particularly, to a sound adjusting method and a sound adjusting apparatus for performing the same, which can automatically adjust a sound pressure level according to adjustment of a loudness level.
Background
Nowadays, people often use earphones to listen to music to achieve a better hearing effect. However, the earphone has a large influence on the hearing of the user, and if the volume is continuously too large, the hearing is easily damaged, so that a way of automatically controlling the volume has been developed nowadays. However, the automatic control of the earphone volume is directly and uniformly adjusted according to the sound pressure level value of the sound, but the sound pressure level value does not represent the actual hearing feeling of the user, and the sound volume is used as the basis of the sound volume adjustment and cannot meet the actual hearing condition of the user.
Therefore, it is necessary to invent a new sound adjusting device with hearing protection function and a sound adjusting method thereof to solve the drawbacks of the prior art.
Disclosure of Invention
The present invention is directed to a sound adjusting method for automatically adjusting the level of sound pressure by adjusting the level of loudness.
Another objective of the present invention is to provide a sound adjusting apparatus for performing the above method.
To achieve the above object, the sound adjusting method of the present invention is applied to a sound adjusting apparatus for adjusting a sound signal. The sound adjusting method of the present invention includes the steps of: obtaining a sound signal, wherein the sound signal comprises a plurality of frequency bands, and each frequency band has a corresponding original sound pressure level value; respectively converting the original sound pressure level values of all frequency bands into corresponding loudness level values; adjusting each loudness level value by a preset loudness level value to obtain the adjusted loudness level value of each frequency band; converting each adjusted loudness level value into corresponding adjusted loudness level values respectively; calculating and obtaining target sound pressure level values of all frequency bands according to the original sound pressure level values of all frequency bands and the adjusted sound pressure level values; adjusting the original sound pressure level value of each frequency band to each target sound pressure level value to obtain an adjusted sound signal; outputting the adjusted sound signal.
The sound adjusting device is used for adjusting sound signals and comprises an input end, a processing unit and an output end. The input end is used for obtaining a sound signal, wherein the sound signal comprises a plurality of frequency bands, and each frequency band has a corresponding original sound pressure level. The processing unit is electrically connected with the input end and comprises a first conversion module, a loudness adjustment module, a second conversion module, a calculation module and a sound intensity adjustment module. The first conversion module is used for converting the original sound pressure level values of all frequency bands into corresponding loudness level values respectively. The loudness adjusting module is used for adjusting each loudness level value by a preset loudness level value so as to obtain the adjusted loudness level value of each frequency band. The second conversion module is used for converting each adjusted loudness level value into a corresponding adjusted loudness level value. The calculation module is used for calculating and obtaining the target sound pressure water level value of each frequency band according to the original sound pressure water level value of each frequency band and each adjusted sound pressure water level value. The sound intensity adjusting module is used for adjusting the original sound pressure level value of each frequency band to each target sound pressure level value so as to obtain an adjusted sound signal. The output end is electrically connected with the processing unit, and the output end is used for outputting the adjusting sound signal.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
FIG. 1 is a diagram of an apparatus architecture of an embodiment of a sound adjusting apparatus according to the present invention;
FIG. 2 is a flowchart illustrating steps of an embodiment of a method for adjusting sound;
FIG. 3 is a diagram showing the volume of different frequency bands of an acoustic signal;
fig. 4 shows a diagram of the conversion between the sound pressure level and the loudness level.
Wherein the reference numerals
Adjusting sound signal 80 sound signal 90
Detailed Description
To better understand the technical content of the present invention, preferred embodiments are specifically illustrated as follows.
Referring to fig. 1, an apparatus architecture diagram of an embodiment of a sound adjusting apparatus according to the present invention is shown.
As shown in fig. 1, the sound adjusting apparatus 1 of the present invention has a hearing protection function, and is configured to adjust a sound pressure level of a sound signal generated by a sound generating apparatus 100 when a volume and an accumulated time of a sound played by a speaker apparatus 200 reach a set condition, and to emit a sound according to the sound signal with the adjusted sound pressure level by the speaker apparatus 200, so as to prevent a user from hearing damage. In addition, the sound adjusting apparatus 1 of the present invention can adjust the sound pressure level of the sound signal according to the sound adjusting command input by the user. In an embodiment, the sound generating device 100 may be a device such as a stereo, a television, or a mobile phone that generates a sound signal, and the speaker device 200 may be an earphone or a speaker, but the invention is not limited to the above-mentioned devices. In addition, in the embodiment, the sound adjusting device 1 can be a microprocessor chip disposed on the sound generating device 100 and connected to the speaker device 200 in a wired or wireless manner for communication, but the invention is not limited thereto. In other embodiments, the sound adjusting apparatus 1 may also be disposed on the speaker apparatus 200 and connected to the sound generating apparatus 100 in a wired or wireless manner for communication.
As shown in fig. 1, in an embodiment of the present invention, a sound adjusting apparatus 1 includes an input terminal 10, a processing unit 20, and an output terminal 30.
In an embodiment of the present invention, the input terminal 10 is connected to communicate with the sound generating apparatus 100 to obtain the sound signal 90 generated by the sound generating apparatus 100. The sound signal 90 includes a plurality of frequency bands, each of the frequency bands having a respective original sound pressure level.
In an embodiment of the present invention, the processing unit 20 is electrically connected to the input terminal 10. The processing unit 20 includes a detection module 21, a first conversion module 22, a loudness adjustment module 23, a second conversion module 24, a calculation module 25, and an intensity adjustment module 26. It should be noted that the modules may be configured as hardware devices, software programs, firmware, or a combination thereof, and may also be configured by circuit loops or other suitable types; moreover, the modules may be arranged in a combined manner, as well as in a single manner. In a preferred embodiment, each module is a software program stored in a storage unit (not shown), and the processing unit 20 executes each module to achieve the functions of the present invention. In addition, the present embodiment only illustrates the preferred embodiments of the present invention, and all possible combinations and modifications are not described in detail to avoid redundancy. However, one of ordinary skill in the art should appreciate that each of the above modules or elements is not necessarily required. And may include other existing modules or components in greater detail for practicing the invention. Each module or component may be omitted or modified as desired, and no other module or component may necessarily exist between any two modules.
In an embodiment of the present invention, the detecting module 21 is configured to detect whether a volume and an accumulated time of a sound previously played by the speaker device 200 exceed a set condition or whether a sound adjusting instruction is received. When the detecting module 21 detects that the volume and the accumulated time of the sound played by the speaker device 200 before exceed the set condition, for example, the time of the sound played by the speaker device 200 before 85 to 87 db has accumulated for 288 seconds, or receives a sound adjusting instruction input by the user through the input interface, the processing unit 20 starts to adjust the sound pressure level of the received sound signal 90 in the following manner.
In an embodiment of the present invention, the first conversion module 22 converts the original sound pressure levels of the frequency bands of the sound signal 90 into corresponding loudness level values according to an equal-loudness curves (equal-loudness curves). The "Sound Pressure Level (SPL)" is an objective physical quantity representing the Sound intensity, and has a unit of decibel (dB). "loudness level" is a subjective psychological quantity representing the intensity of a sound, expressed in phons. In an embodiment, the sound adjusting apparatus 1 may store a standard equal loudness curve, such as a fletcher-monton curve, but not limited thereto.
In an embodiment of the present invention, the loudness adjustment module 23 is configured to adjust each of the loudness level values by a preset loudness level value to obtain an adjusted loudness level value of each frequency band of the sound signal 90. In an embodiment, if the adjustment is performed according to the volume and the accumulated time of the sound previously played by the speaker device 200 exceeding the set conditions, the preset loudness level is determined according to the volume and the accumulated time of the sound previously played by the speaker device 200. The relationship between the preset loudness level and the volume and accumulated time of the sound played by the speaker device 200 in the past will be described in more detail below, and will not be described in detail herein. In addition, if the adjustment is performed according to the received audio adjustment command, the preset loudness level is a fixed value set in advance, for example, 15 phons.
In an embodiment of the present invention, the second converting module 24 is configured to convert each adjusted loudness level value into a corresponding adjusted sound pressure level value. Similarly, the conversion between the adjusted loudness level and the adjusted loudness level is performed according to the aforementioned equal loudness curve, but not limited thereto.
In an embodiment of the invention, the calculating module 25 is configured to calculate and obtain the target sound pressure level value of each frequency band of the sound signal 90 according to the original sound pressure level value and each adjusted sound pressure level value of each frequency band of the sound signal 90. For example, if the original sound pressure level value of the sound signal 90 in the 1000 hz band is 90 db, and the adjusted sound pressure level value of the sound signal 90 in the 1000 hz band is 75 db, the calculating module 25 subtracts the original sound pressure level value by 90 db from the adjusted sound pressure level value by 75 db to obtain a target sound pressure level value of-15 db.
In an embodiment of the present invention, the sound intensity adjustment module 26 is configured to adjust the original sound pressure level value of each frequency band of the sound signal 90 to each target sound pressure level value to obtain an adjusted sound signal 80. For example, if the original sound pressure level of the sound signal 90 at the 1000 hz band is 90 db and the calculated target sound pressure level is-15 db, the sound pressure level of the sound signal 80 at the 1000 hz band is adjusted to 75 db, which is equal to the original sound pressure level of 90 db plus the target sound pressure level of-15 db.
In an embodiment of the present invention, the output terminal 30 is electrically connected to the processing unit 20 and is in wired or wireless communication with the speaker device 200. The output terminal 30 is used for outputting the adjusted sound signal 80.
Referring to fig. 1 to fig. 4 together, wherein fig. 2 is a flowchart illustrating steps of an embodiment of a sound adjusting method according to the present invention, and the steps shown in fig. 2 will be described below with reference to fig. 1, fig. 3 and fig. 4. It should be noted that, although the sound adjusting method of the present invention is described below by taking the sound adjusting apparatus 1 as an example, the sound adjusting method of the present invention is not limited to the use of the sound adjusting apparatus 1 having the same configuration as described above.
First, step S1 is performed: an audio signal is obtained.
The input terminal 10 is connected to the sound generating apparatus 100 by wire or wireless, so as to obtain the sound signal 90 generated by the sound generating apparatus 100. The sound signal 90 includes a plurality of frequency bands, and each frequency band has a corresponding original sound pressure level. Taking fig. 3 as an example, the multiple frequency bands may include three frequency bands of 100 hz, 1000 hz and 10000 hz, wherein the original sound pressure level value of the 100 hz frequency band is 100 db, the original sound pressure level value of the 1000 hz frequency band is 90 db, and the original sound pressure level value of the 10000 hz frequency band is 80 db, but the invention is not limited thereto.
Step S2 is performed: whether the volume and the accumulated time of the sound played by the loudspeaker device previously exceed the set conditions or whether a sound adjusting instruction is received is detected.
The detecting module 21 of the processing unit 20 detects whether the volume and the accumulated time of the sound played by the speaker device 200 previously exceed the set conditions, or whether a sound adjusting instruction input by the user is received. If the volume and the accumulated time of the audio played by the speaker device 200 do not exceed the predetermined conditions and the processing unit 20 does not receive the audio adjustment command, the audio signal 90 is directly outputted without performing the audio adjustment (i.e., step S9 is executed). When the detecting module 21 detects that the volume and the accumulated time of the sound played by the speaker device 200 before exceed the set condition, for example, the time of the sound played by the speaker device 200 before 85 to 87 db has accumulated for 288 seconds, or receives a sound adjusting instruction input by the user through the input interface, the processing unit 20 starts to adjust the sound pressure level of the sound signal 90 in the following steps S3 to S7. That is, the sound adjusting method of the present invention can be applied to the volume adjustment for protecting the hearing of the user, or the user can control the volume to be increased or decreased.
Step S3 is performed: and respectively converting the original sound pressure level values of all frequency bands of the sound signal into corresponding loudness level values.
When it is detected that the volume and the accumulated time of the sound played by the speaker device 200 before exceed the predetermined conditions or a sound adjustment command is detected, the first conversion module 22 converts the original sound pressure level values of each frequency band of the sound signal 90 into corresponding sound pressure level values according to an equal-loudness curves (equal-loudness curves), which may be, for example, fletcher-monton curves, and which may be stored in the sound adjustment device 1 in advance. As an example, as shown in fig. 4, the original sound pressure level value of the 100 hz band is 100 db, and is converted into a corresponding loudness level value of 91(phons), the original sound pressure level value of the 1000 hz band is 90 db, and is converted into a corresponding loudness level value of 90(phons), the original sound pressure level value of the 10000 hz band is 80 db, and is converted into a corresponding loudness level value of 67 (phons).
Step S4 is performed: and adjusting each loudness level value by a preset loudness level value to obtain the adjusted loudness level value of each frequency band of the sound signal.
After completing step S3, the loudness adjustment module 23 adjusts each loudness level converted in step S3 by a predetermined loudness level to obtain adjusted loudness levels of each frequency band of the audio signal 90. For example, as shown in fig. 4, the preset loudness level is-15 (phons), so that the adjusted loudness level in the 100 hz band is 76(phons), the adjusted loudness level in the 1000 hz band is 75(phons), and the adjusted loudness level in the 10000 hz band is 52 (phons). It should be noted that, in the embodiment, if the adjustment is performed according to the volume and the accumulated time of the sound played by the speaker device 200 before exceeding the set conditions, the preset loudness level of the present invention can be determined according to the volume and the accumulated time of the sound played by the speaker device 200 before, but is not limited to the only value, and the specific corresponding relationship between the preset loudness level and the volume and the accumulated time of the sound played by the speaker device 200 before can be shown in the following table.
As can be seen from the above table, in the illustrated example, assuming that the time of the speaker 200 playing 85-87 db sound has accumulated for 288 seconds, the loudness adjustment module 23 decreases the loudness level by 5(phons) (i.e. the preset loudness level is-5 (phons)); when the time that the speaker 200 played 85-87 db sound has accumulated for 504 seconds, the loudness adjustment module 23 decreases the loudness level of 15(phons) (i.e., the preset loudness level is-15 (phons)). When the time that the speaker 200 played 94-96 db sound has accumulated for 63 seconds, the loudness adjustment module 23 also decreases the loudness level of 15(phons) (i.e., the preset loudness level is-15 (phons)). In addition, if the adjustment is performed according to the received sound adjustment command, the preset loudness level value is a fixed value set in advance. For example, if the loudness level of the 100 hz band is 91(phons), if the sound adjustment command inputted by the user is a volume up command, the loudness adjustment module 23 will increase the loudness level of 15(phons) (i.e. the preset loudness level is 15(phons)), so as to obtain the adjusted loudness level of 106(phons) for the band.
Step S5 is performed: and converting each adjusted loudness level value into a corresponding adjusted loudness level value respectively.
After step S4 is completed, the second conversion module 24 converts each adjusted loudness level value into a corresponding adjusted loudness level value according to the equal loudness curve. Taking fig. 4 as an example, the adjusted loudness level value of the 100 hz band is 76(phons), and is converted into a corresponding adjusted loudness level value of 90 db; the adjusted loudness level value of the 1000 Hz frequency band is 75(phons), and the adjusted loudness level value is converted into a corresponding adjusted loudness level value of 75 decibels; the adjusted loudness level value in the 10000 hz band is 52(phons), which is converted into a corresponding adjusted loudness level value of 66 db.
Step S6 is performed: and calculating to obtain the target sound pressure level value of each frequency band according to the original sound pressure level value of each frequency band and each adjusted sound pressure level value.
After obtaining the adjusted sound pressure level value, the calculating module 25 calculates and obtains a target sound pressure level value of each frequency band according to the original sound pressure level value and the adjusted sound pressure level value of each frequency band. Taking the previously disclosed example as an example, if the original sound pressure level value of the 100 hz band is 100 db, and the adjusted sound pressure level value is 90 db, the calculating module 25 will use the difference-10 db between 90 db and 100 db as the target sound pressure level value, that is, the target sound pressure level value is equal to the adjusted sound pressure level value minus the original sound pressure level value; the original sound pressure level value of the 1000 Hz frequency band is 90 dB, the adjusted sound pressure level value is 75 dB, and the obtained target sound pressure level value is-15 dB; the original sound pressure level value of the 10000 Hz frequency band is 80 dB, the adjusted sound pressure level value is 66 dB, and the obtained target sound pressure level value is-14 dB.
Step S7 is performed: and adjusting the original sound pressure level value of each frequency band to each target sound pressure level value to obtain an adjusted sound signal.
After obtaining the target sound pressure level, the sound intensity adjustment module 26 adds the original sound pressure level of each frequency band to the target sound pressure level to be adjusted of each frequency band, so as to obtain the adjusted sound signal 80. Taking the above example as an example, the sound signal 80 is adjusted to include a 100 hz band, a 1000 hz band and a 10000 hz band, and the sound pressure level values of the bands are 90 db, 75 db and 66 db, respectively.
Finally, step S8 is performed: outputting the adjusted sound signal.
Finally, the output terminal 14 is used to output the adjusted sound signal 80 to the speaker device 200.
As can be seen from the foregoing disclosure, the sound adjusting apparatus 1 of the present invention can achieve better hearing protection effect by respectively adjusting the sound pressure levels of different sound frequency bands, and the basis of the turn-down is converted according to the loudness level after the turn-down, so that the turn-down can be performed
It should be noted that the above embodiments only illustrate the preferred embodiments of the present invention, and all possible combinations of the variations are not described in detail for avoiding redundancy. However, one of ordinary skill in the art should appreciate that each of the above modules or elements is not necessarily required. And may include other existing modules or components in greater detail for practicing the invention. Each module or component may be omitted or modified as desired, and no other module or component may necessarily exist between any two modules.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A sound adjusting method for a sound adjusting apparatus to adjust a sound signal, the method comprising:
obtaining the sound signal, wherein the sound signal comprises a plurality of frequency bands, and each frequency band has an original sound pressure level value;
converting the original sound pressure level value of each frequency band into a corresponding loudness level value;
adjusting each loudness level value by a preset loudness level value to obtain an adjusted loudness level value of each frequency band;
converting each adjusted loudness level value into a corresponding adjusted sound pressure level value;
calculating a target sound pressure level value of each frequency band according to the original sound pressure level value of each frequency band and each adjusted sound pressure level value;
adjusting the original sound pressure level value of each frequency band to the target sound pressure level value to obtain an adjusted sound signal; and
outputting the adjusted sound signal.
2. The method of claim 1, wherein the predetermined loudness level is determined according to a volume and accumulated time of a sound previously played by a speaker device.
3. The method of claim 1 wherein the converting of the original sound pressure level value into the corresponding loudness level value and the converting of the adjusted sound pressure level value into the corresponding adjusted sound pressure level value are performed according to an equal loudness curve.
4. The method of claim 1, further comprising the steps of:
whether the volume and the accumulated time of the sound played by a loudspeaker device previously exceed a set condition or whether a sound adjusting instruction is received is detected.
5. An audio adjusting apparatus for adjusting an audio signal, the audio adjusting apparatus comprising:
an input end for obtaining the sound signal, wherein the sound signal comprises a plurality of frequency bands, and each frequency band has an original sound pressure level value;
a processing unit electrically connected to the input terminal, the processing unit comprising:
a first conversion module for converting the original sound pressure level value of each frequency band into a corresponding loudness level value;
a loudness adjusting module, for adjusting each loudness level value by a preset loudness level value to obtain an adjusted loudness level value of each frequency band;
the second conversion module is used for converting each adjusted loudness level value into a corresponding adjusted sound pressure level value;
a calculation module, configured to calculate and obtain a target acoustic pressure level value of each frequency band according to the original acoustic pressure level value of each frequency band and each adjusted acoustic pressure level value; and
the sound intensity adjusting module is used for adjusting the original sound pressure level value of each frequency band to each target sound pressure level value so as to obtain an adjusted sound signal; and
an output end electrically connected to the processing unit for outputting the adjusted sound signal.
6. The audio adjusting apparatus of claim 5, wherein the predetermined loudness level is determined according to a volume and an accumulated time of a previous audio played by the speaker.
7. The apparatus of claim 5, wherein the first converting module converts the original sound pressure level values of the frequency bands into the corresponding loudness level values according to an equal loudness curve; the second conversion module converts each adjusted loudness level value into a corresponding adjusted sound pressure level value according to the equal loudness curve.
8. The apparatus of claim 5, further comprising a detection module for detecting whether a volume and accumulated time of a sound previously played by the speaker device exceed a predetermined condition or a sound adjustment command is received.
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| CN114501233A (en) * | 2022-01-30 | 2022-05-13 | 联想(北京)有限公司 | Signal processing method and device and electronic equipment |
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| CN112019973B (en) | 2022-04-26 |
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