CN110881155A - Equal loudness curve-based horn loudness adjusting method - Google Patents
Equal loudness curve-based horn loudness adjusting method Download PDFInfo
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- CN110881155A CN110881155A CN201910931022.2A CN201910931022A CN110881155A CN 110881155 A CN110881155 A CN 110881155A CN 201910931022 A CN201910931022 A CN 201910931022A CN 110881155 A CN110881155 A CN 110881155A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000005236 sound signal Effects 0.000 claims abstract description 75
- 230000013707 sensory perception of sound Effects 0.000 claims abstract description 10
- 238000007781 pre-processing Methods 0.000 claims abstract description 7
- 241000282414 Homo sapiens Species 0.000 description 12
- 210000005069 ears Anatomy 0.000 description 8
- 230000008447 perception Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention relates to a horn loudness adjusting method based on an equal loudness curve, which belongs to the field of horns and comprises the following steps: s1, the signal source sends the sound signal to the digital signal processor; s2, preprocessing the received sound signal by the digital signal processor, then sending the sound signal to a power amplifier, amplifying the obtained sound signal by the power amplifier, and sending the amplified sound signal to a loudspeaker to make the loudspeaker sound; in step S2, the preprocessing performed by the digital signal processor on the received sound signal includes detecting a sound pressure level and a frequency of the sound signal, analyzing and comparing the sound pressure level and the frequency of the sound signal according to an equal loudness curve, if the sound signal is within a hearing threshold, not processing the sound signal, and if the sound signal is outside the hearing threshold, increasing the loudness of the sound signal by using the digital signal processor so that the sound signal is within the hearing threshold. The invention can adjust the loudness of the loudspeaker to improve the user experience.
Description
Technical Field
The invention relates to the field of loudspeakers, in particular to a loudspeaker loudness adjusting method based on an equal loudness curve.
Background
The perception of sound by the human ear is not only related to sound pressure, but also frequency. Sounds with the same sound pressure level and different frequencies sound with different sound degrees. For example, the air compressor and the electric saw are both 100 dB noise, and the electric saw sounds louder. According to the sound perception characteristic of human ears, the subjective sound perception quantity of human beings to sound is determined according to sound pressure and frequency, namely loudness level, the unit is square, the perception of human ears to loudness can be represented by equal loudness curve, as shown in fig. 1, the equal loudness curve refers to the curve of the relation between sound pressure level and frequency of pure sound with the same perceived loudness of typical listeners, the lowest dotted line in the equal loudness curve is the pure sound minimum audible sound field-the minimum audible threshold curve for binaural listening, the area above the minimum audible threshold curve is the audible threshold, the sound below the audible threshold curve is not perceived by human ears, so that the human ears cannot perceive low-frequency sound, and the experience is poor, therefore, a method for adjusting the loudness of horns is needed in the art.
Disclosure of Invention
Based on this, there is a need for an equal loudness curve-based horn loudness adjustment method, which includes the following steps:
s1, the signal source sends the sound signal to the digital signal processor;
s2, preprocessing the received sound signal by the digital signal processor, then sending the sound signal to a power amplifier, amplifying the obtained sound signal by the power amplifier, and sending the amplified sound signal to a loudspeaker to make the loudspeaker sound;
in step S2, the preprocessing performed by the digital signal processor on the received sound signal includes detecting a sound pressure level and a frequency of the sound signal, analyzing and comparing the sound pressure level and the frequency of the sound signal according to an equal loudness curve, if the sound signal is within a hearing threshold, not processing the sound signal, and if the sound signal is outside the hearing threshold, increasing the loudness of the sound signal by using the digital signal processor so that the sound signal is within the hearing threshold.
Preferably, in step 2, the digital signal processor increases the loudness of the sound signal by increasing the sound pressure level of the sound signal.
The digital signal processor adjusts the sound signal emitted by the signal source according to the equal loudness curve so as to improve the loudness of the sound, so that the sound emitted by the loudspeaker after receiving the sound signal is within an audible threshold, the sound emitted by the loudspeaker can be ensured to be sensed by human ears, and the use experience of a user is improved.
The digital signal processor finds the lowest sound pressure level of the sound signal with the corresponding frequency within the audible threshold by inquiring the equal loudness curve, and increases the sound pressure level of the sound signal to be greater than or equal to the lowest sound pressure level within the audible threshold, so that the human ear can feel the sound signal.
Preferably, the digital signal processor increases the sound pressure level of the sound signal by increasing the output voltage of the power supply for the power amplifier.
The power amplifier with rated voltage has limited improvement on the sound pressure level, so that the sound pressure level of the sound signal can be increased by improving the voltage of the power supply of the power amplifier, the range of increasing the sound pressure level can be increased, the adjustability of the power amplifier can be further increased, and the loudness of the sound can be ensured to be increased to the range which can be felt by human ears.
Preferably, the digital signal processor is connected with a signal receiver, and the signal receiver is used for receiving the signal of the signal source and sending the signal to the digital signal processor.
Preferably, the signal receiver includes a wired signal receiver and a wireless signal receiver.
The signal receiver can adopt various types of signal receivers commonly used in the market for receiving signals of various types of signal sources.
The principle and effect of the present invention will be further explained by combining the above technical solutions:
the digital signal processor adjusts the sound signal emitted by the signal source according to the equal loudness curve so as to improve the loudness of the sound, so that the sound emitted by the loudspeaker after receiving the sound signal is within an audible threshold, the sound emitted by the loudspeaker can be ensured to be sensed by human ears, and the use experience of a user is improved.
Drawings
FIG. 1 is a graph of equal loudness;
fig. 2 is a schematic structural diagram of a horn according to an embodiment of the present invention.
Description of reference numerals:
1-signal source 1, 2-digital signal processor 2, 3-power amplifier 3, 4-power source 4, 5-loudspeaker 5.
Detailed Description
For the convenience of understanding of those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings and examples:
referring to fig. 2, a method for adjusting the loudness of a horn based on an equal loudness curve includes the following steps:
s1, the signal source 1 sends the sound signal to the digital signal processor 2;
s2, the digital signal processor 2 preprocesses the received sound signal, then sends the sound signal to the power amplifier 3, the power amplifier 3 amplifies the obtained sound signal and sends the amplified sound signal to the loudspeaker 5, so that the loudspeaker 5 makes a sound;
in step S2, the preprocessing of the received sound signal by the digital signal processor 2 includes detecting the sound pressure level and the frequency of the sound signal, analyzing and comparing the sound pressure level and the frequency of the sound signal according to the equal loudness curve, if the sound signal is within the threshold, not processing the sound signal, and if the sound signal is outside the threshold, increasing the loudness of the sound signal by using the digital signal processor 2 so that the sound signal is within the threshold.
In one embodiment, step 2, the digital signal processor 2 increases the loudness of the sound signal by increasing the sound pressure level of the sound signal.
The invention adjusts the sound signal of the signal source 1 through the equal loudness curve, thereby ensuring that the sound emitted by the loudspeaker 5 after receiving the sound signal is within the audible threshold, ensuring that people can feel the sound emitted by the loudspeaker 5, and improving the use experience of users.
The digital signal processor 2 finds the lowest sound pressure level of the sound signal with the corresponding frequency within the audible threshold by inquiring the equal loudness curve, and increases the sound pressure level of the sound signal to be greater than or equal to the lowest sound pressure level within the audible threshold, so that the human ear can feel the sound signal.
In one embodiment, the digital signal processor 2 increases the sound pressure level of the sound signal by increasing the output voltage of the power supply 4 for the power amplifier 3.
The power amplifier 3 with rated voltage has a limit to improve the sound pressure level, so the invention can improve the range of increasing the sound pressure level by improving the voltage of the power supply 4 of the power amplifier 3 to improve the sound pressure level of the sound signal, and further can increase the adjustability of the invention to ensure that the loudness of the sound can be improved to the range which can be felt by human ears.
In one embodiment, the digital signal processor 2 is connected to a signal receiver, and the signal receiver is configured to receive a signal from the signal source 1 and send the signal to the digital signal processor 2.
In one embodiment, the signal receiver includes a wired signal receiver and a wireless signal receiver.
The signal receiver can adopt various types of signal receivers commonly used in the market for receiving signals of various forms of the signal source 1.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A horn loudness adjusting method based on equal loudness curves comprises the following steps:
s1, the signal source sends the sound signal to the digital signal processor;
s2, preprocessing the received sound signal by the digital signal processor, then sending the sound signal to a power amplifier, amplifying the obtained sound signal by the power amplifier, and sending the amplified sound signal to a loudspeaker to make the loudspeaker sound;
in step S2, the preprocessing performed by the digital signal processor on the received sound signal includes detecting a sound pressure level and a frequency of the sound signal, analyzing and comparing the sound pressure level and the frequency of the sound signal according to an equal loudness curve, if the sound signal is within a hearing threshold, not processing the sound signal, and if the sound signal is outside the hearing threshold, increasing the loudness of the sound signal by using the digital signal processor so that the sound signal is within the hearing threshold.
2. The equal loudness curve-based horn loudness adjustment method according to claim 1, characterized in that in step 2, the digital signal processor increases the loudness of the sound signal by increasing the sound pressure level of the sound signal.
3. The equal loudness curve-based horn loudness adjustment method of claim 2, characterized in that the digital signal processor increases the sound pressure level of the sound signal by increasing the output voltage of the power supply that powers the power amplifier.
4. The equal loudness curve-based horn loudness adjustment method according to claim 1, characterized in that a signal receiver is connected to the digital signal processor, and the signal receiver is used for receiving the signal of the signal source and sending the signal to the digital signal processor.
5. The light box direction finding based horn loudness adjustment method of claim 4, characterized in that the signal receivers comprise wired signal receivers and wireless signal receivers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910931022.2A CN110881155A (en) | 2019-09-29 | 2019-09-29 | Equal loudness curve-based horn loudness adjusting method |
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| CN201910931022.2A CN110881155A (en) | 2019-09-29 | 2019-09-29 | Equal loudness curve-based horn loudness adjusting method |
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2019
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| CN1798452A (en) * | 2004-12-28 | 2006-07-05 | 三星电子株式会社 | Method of compensating audio frequency response characteristics in real-time and a sound system using the same |
| CN101573866A (en) * | 2007-01-03 | 2009-11-04 | 杜比实验室特许公司 | Hybrid digital/analog loudness-compensating volume control |
| US20090103752A1 (en) * | 2007-10-19 | 2009-04-23 | Realtek Semiconductor Corp. | Device and method for automatically adjusting gain |
| CN101465625A (en) * | 2007-12-20 | 2009-06-24 | 瑞昱半导体股份有限公司 | Device and method for automatically adjusting gain |
| CN102474232A (en) * | 2009-08-11 | 2012-05-23 | Srs实验室有限公司 | System for increasing perceived loudness of speakers |
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Application publication date: 20200313 |