780 results about "Loudness" patented technology

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, a magnetic circuit system of the sound production device comprises a magnetic conductive yoke, and side magnetic parts, a common magnetic part and two central magnetic parts which are arranged on the magnetic conductive yoke, the side magnetic parts are annularly arranged to form an accommodating space, the common magnetic part is located in the accommodating space and is connected with the side magnetic parts, and the two central magnetic parts are arranged in the accommodating space. The magnetic circuit system is arranged in the containing space to divide the containing space into two installation spaces, each center magnetic part is located in one installation space, the center magnetic parts, the side magnetic parts and the common magnetic part are spaced to define a magnetic gap, the vibration system comprises a vibrating diaphragm assembly and two voice coils, the periphery of the vibrating diaphragm assembly is connected to the shell and is opposite to the magnetic circuit system, and the two voice coils are arranged side by side. One end of each voice coil is connected to the diaphragm assembly, and the other end of each voice coil is suspended in one magnetic gap. According to the sound production device, the size of the voice coil and the magnet volume of the magnetic circuit system are increased, so that the BL value is improved, and the whole machine performance and the sound effect loudness are improved.

A pickleball ball is provided for increasing durability, improving performance, and / or reducing the loudness and / or frequency of sound generated when said ball strikes a paddle. The ball being a hollow ball comprised of a spherical shell defining a hollow cavity. The ball is made of a graphene-infused polymer material and the shell defines a plurality of holes distributed around the surface of the ball.

The invention provides an open earphone audio optimization method based on a self-adaptive compensation algorithm, and aims to improve the audio auditory experience of a user. The method comprises the following steps: firstly, acquiring an environmental noise signal through an earphone microphone, receiving a target audio signal, analyzing auditory perception of a user in a current environment by combining an ISO226 loudness curve and the like, and determining auditory sensitivity of the user to different frequency bands (including high frequency, intermediate frequency and low frequency); and then, enhancing the high-frequency part, deepening the low-frequency part and performing smooth transition compensation on the intermediate-frequency part by using a self-adaptive compensation algorithm. And then, dynamically adjusting the low-frequency part by using a hyperbolic filter, generating an adjusted audio signal, and generating a harmonic signal based on the amplitude and frequency characteristics to further optimize the tone quality. Finally, the optimized audio signal and the generated harmonic signal are provided for a user together, and the effects of automatically optimizing audio output in different environments and enhancing tone quality performance are achieved.

A system may include a storage device, configured to store computer-executable instructions. A system may include an ear-bud configured to be positioned within an ear canal of a user, the ear-bud comprising: a speaker, a microphone; and one or more processors in communication with the storage device, wherein the computer-executable instructions, when executed by the one or more processors, cause the one or more processors to: obtain a user hearing profile, obtain an equal-loudness hearing profile, receive audio data from the microphone, and generate a second audio data based on a first sound-pressure level, a second sound-pressure level, a first frequency; and cause the speaker to emit the second audio data within the ear canal of the user, such that the user perceives the audio data as if the user has normal hearing.

The utility model relates to the technical field of audio, in particular to a loudspeaker and electronic equipment. The embodiment of the utility model provides a loudspeaker, which comprises a shell, a first vibration assembly, a second vibration assembly, a first magnetic circuit assembly, a second magnetic circuit assembly and a magnetic conductive piece, and the magnetic conductive piece is fixed on the inner side of the shell. The loudspeaker comprises two sets of vibration assemblies, the two sets of vibration assemblies are located on the two side faces of the magnetic conductive part, so that the two sets of vibration assemblies can independently produce sound, the first voice coil can drive the first vibrating diaphragm to vibrate, the second voice coil can drive the second vibrating diaphragm to vibrate, and the loudspeaker can have better low-frequency loudness through cooperation of the first vibrating diaphragm and the second vibrating diaphragm; therefore, the sound quality of the loudspeaker is improved. By arranging the magnetic conductive member, the magnetic circuit design is simplified, and the first magnetic circuit assembly and the second magnetic circuit assembly can be supported, so that the design of the support structure of the loudspeaker is simplified, the thin design of the loudspeaker is facilitated, and the adaptability of the loudspeaker to the application environment is improved.

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, the sound production device comprises a magnetic circuit system and a vibration system, a central magnetic part of the magnetic circuit system comprises two central magnetic groups, and an edge magnetic part comprises an outer magnetic group located on the outer sides of the two central magnetic groups and a common magnetic group located between the two central magnetic groups. The outer magnetic group and the common magnetic group are spaced from each central magnetic group so as to define two magnetic gaps which are arranged at intervals, each central magnetic group comprises a first central magnet, a central magnetic conductive plate and a second central magnet which are arranged in a stacked mode, and the outer magnetic group and the common magnetic group each comprise a first edge magnet, an edge magnetic conductive plate and a second edge magnet which are arranged in a stacked mode. The vibration system comprises a vibrating diaphragm and two voice coils, and each voice coil corresponds to one magnetic gap. According to the sound production device, the utilization rate of the magnetic circuit system is further improved by optimizing the magnetic circuit system and adopting the double voice coils, so that the loudness and the sensitivity of the sound production device are improved.

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electro-acoustic transformation.The sound production device comprises a shell, a magnetic circuit system and a vibration system, a common magnetic part of the magnetic circuit system is located on the outer side of a center magnetic part and is spaced from the center magnetic part to form a first magnetic gap, and side magnetic parts are located on the outer side of the common magnetic part and are spaced from the center magnetic part to form a second magnetic gap; an inner ring hole is formed in the center of a vibrating diaphragm of the vibrating system, the inner periphery of the vibrating diaphragm is connected with the magnetic circuit system, the first voice coil corresponds to the first magnetic gap, the second voice coil corresponds to the second magnetic gap, and the first voice coil and the second voice coil are connected to the vibrating diaphragm through a framework. According to the sound production device, the utilization rate of the magnetic circuit system is effectively improved, the BL value is improved, the loudness and sensitivity of the sound production device are improved, the first voice coil and the second voice coil are connected to the vibrating diaphragm through the framework, the positions of the first voice coil and the second voice coil in the magnetic circuit system are convenient to adjust, and the design of the magnetic circuit system is more flexible.

The invention discloses a self-adaptive sound effect management method and system with a scene analysis module, and relates to the field of self-adaptive sound effect management, and the method comprises the following steps: S1, collecting environmental acoustic characteristics and user behavior data in real time through the scene analysis module; s2, dynamically extracting user hearing preference parameters and scene classification labels; s3, constructing a virtual audition sweet zone matched with the physical space; and S4, dynamically adjusting the phase delay and the energy distribution proportion of each frequency band, and generating an optimal loudness equalization curve meeting the multi-scene constraint. According to the method, adaptive matching of sound field characteristics is realized in a complex dynamic scene through a multi-level perception-optimization closed-loop architecture, acoustic feature extraction and physical space modeling are deeply fused, the technical boundary of traditional pure signal processing is broken through, and the problem of multi-target conflict is solved based on cross-modal collaborative learning and a global optimization algorithm.

The invention relates to a self-adaptive frequency optimization system in radio and television microwave transmission, and the system comprises an initial audio collection and processing module which collects an audio signal of a current frequency channel in real time, and generates a first data set; the conversion audio acquisition processing module synchronously acquires a target channel signal according to the frequency switching signal, and calculates the loudness offset between two channels; a feature extraction module extracts frequency domain energy distribution feature vectors of the first data set and the second data set; the model construction module constructs a dynamic gain compensation model and generates a compensation value of a target channel; the tone quality compensation module performs smoothing processing on the compensation value to generate an optimized third data set; and the audio optimization module updates model parameters, dynamically adjusts a frequency domain analysis strategy, and outputs low-delay and high-stability radio and television transmission signals. According to the invention, the problems of high switching delay and degraded tone quality caused by static configuration in a traditional scheme are solved, and the transmission efficiency and user experience in a complex electromagnetic environment are remarkably improved through modular dynamic calibration and compensation.

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electro-acoustic transformation.The sound production device comprises a shell, a magnetic circuit system and a vibration system, a common magnetic part of the magnetic circuit system is located on the outer side of a center magnetic part and is spaced from the center magnetic part to form a first magnetic gap, and side magnetic parts are located on the outer side of the common magnetic part and are spaced from the center magnetic part to form a second magnetic gap; the central magnetic part comprises a first central magnet, a central magnetic conductive plate and a second central magnet which are arranged in a stacked mode, the shared magnetic part comprises a first shared magnet, a shared magnetic conductive plate and a second shared magnet which are arranged in a stacked mode, and an inner ring hole is formed in the center of a vibrating diaphragm of the vibrating system. The inner periphery of the vibrating diaphragm is connected with the magnetic circuit system, the first voice coil corresponds to the first magnetic gap, and the second voice coil corresponds to the second magnetic gap. According to the sound production device, the utilization rate of the magnetic circuit system is effectively improved, and the BL value is improved, so that the loudness and sensitivity of the sound production device are improved.

A loudspeaker system and method can measure a specific user's hearing and implement compensatory or corrective processing to address the user's hearing deficiencies. The user's hearing acuity may be determined by (i) headphone techniques in which frequency-based hearing thresholds are determined; (ii) a loudspeaker system set up as intended for use in an acoustic space to emit tonal stimuli; or (iii) inducing, acquiring, and interpreting otoacoustic emissions. Once the hearing profile is determined, appropriate signal processing parameters can be used to generate a corrected audio output signal adjustment. The administered hearing test results can include a plurality of hearing loudness threshold levels at respective test frequencies. The hearing correction system's corrected audio output can be generated from corrected loudness values at selected correction frequency sub-bands.

The invention relates to the technical field of cable safety early warning, in particular to a cable safety early warning system based on voiceprint recognition, which comprises a monitoring module, a data storage module, a data processing module, an analysis module and an alarm module. The data processing module performs fitting calculation on a burying collapse tendency parameter through a predetermined formula, determines a processing mode for the loudness acquired by the voiceprint sensor through the burying collapse tendency parameter, and determines the change condition of the loudness and the audio complexity in detail when the burying area of the cable is in a burying strong collapse tendency category; whether the alarm module is controlled to send out alarm information is comprehensively determined, and the cable safety monitoring efficiency is improved while the cable alarm accuracy is improved.

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, the sound production device comprises a shell, a magnetic circuit system and a vibration system, a common magnetic part of a bass magnetic circuit part in the magnetic circuit system is respectively separated from a central magnetic part and a side magnetic part to form a first bass magnetic gap and a second bass magnetic gap, the high-pitch magnetic circuit part is located on the outer side of the edge magnetic part, a first low-pitch voice coil of a low-pitch vibration unit in the vibration system corresponds to the first low-pitch magnetic gap, a second low-pitch voice coil of the low-pitch vibration unit corresponds to the second low-pitch magnetic gap, and the high-pitch vibration unit is connected to the shell and is opposite to the high-pitch magnetic circuit part in a spaced mode. According to the sound production device, the utilization rate of the magnetic circuit system is effectively improved, and the BL value is improved, so that the loudness and the sensitivity of the sound production device are improved, and full frequency and miniaturization are realized.

The invention discloses an atmosphere lamp control method, electronic equipment and a program product. The method comprises the following steps: acquiring PCM data of an audio signal in real time in the music playing process of a vehicle; performing frequency domain analysis on the PCM data corresponding to each audio frame, and extracting frequency information and loudness information; the method comprises the following steps: calculating frequency information and loudness information of a preset number of continuous audio frames, and respectively calculating a frequency change rate and a loudness change rate within a preset time; respectively comparing the frequency change rate and the loudness change rate with corresponding change rate thresholds; and if at least one of the frequency change rate and the loudness change rate exceeds the corresponding change rate threshold value, a corresponding light updating instruction is sent to the atmosphere lamp control module. The music rhythm function of the automotive interior atmosphere lamp can be enhanced, and the cooperative interaction ability of music and the atmosphere lamp is improved.

The invention provides an in-vehicle noise comfort test method based on a multi-dimensional index, and belongs to the technical field of acoustic test and evaluation, the method is suitable for manual-shift and automatic-shift vehicles, and under the vehicle acceleration operation condition, when a preset acceleration condition is met, the in-vehicle noise comfort test is carried out. The maximum value of the A-weighted sound pressure level, the loudness value and the sharpness value of the preset noise measuring point position can be measured and recorded, multiple times of measurement are completed before the rotating speed of the engine reaches 90% of the rated rotating speed, and the arithmetic mean value is calculated to serve as an intermediate result. For a constant-speed operation condition, the A weighting sound pressure level and the loudness value are measured and recorded for multiple times, and an arithmetic mean value is calculated as an intermediate result; according to the method, the two psychoacoustic parameters including the loudness and the sharpness are introduced to serve as indexes for evaluating the comfort performance of the noise in the vehicle, and the actual perception and subjective experience of human ears on the noise can be reflected more accurately.

This disclosure provides methods, devices, and systems for audio signal processing. The present implementations more specifically relate to speech enhancement techniques that are agnostic to varying signal levels in near-end audio signals. In some aspects, a speech enhancement system may include a delay estimator, an input normalizer, and an acoustic echo and noise (AEN) decoupling filter. The delay estimator receives a near-end audio signal via a microphone and a far-end audio signal for output via a speaker and estimates a reference audio signal based on a delay between the near-end audio signal and the far-end audio signal. The input normalizer normalizes a loudness of the near-end audio signal and the reference audio signal. The AEN decoupling filter determines a set of masks based on the normalized audio signals and suppresses an echo component and a noise component of the near-end audio signal based on the set of masks.

The invention discloses a subjective and objective fused air conditioner sound quality analysis and evaluation method, which comprises the following steps of: 1, forming a working condition-gear combination matrix according to an actual use scene and noise characteristics of an air conditioner; 2, arranging sensor measuring points according to a noise source scene of working condition-gear combination, and obtaining a sound sample; 3, carrying out subjective evaluation on the sound sample, and processing an abnormal score by adopting a 3 sigma principle and a box plot method to obtain a final subjective score; 4, five objective psychological acoustic indexes including loudness, roughness, sharpness, jitter degree and highlight ratio of 24 Bark frequency bands of the sound sample are calculated, and an objective index set is established; and 5, constructing an air conditioner subjective and objective fusion evaluation model of a two-stage fusion model of the time sequence convolutional network and the gradient boosting tree. According to the method, the problem of low evaluation precision of a general model caused by noise characteristic difference under different working conditions-gears is solved, an accurate air conditioner sound quality evaluation system is constructed, and support is provided for sound quality optimization design and quality evaluation of the air conditioner.

The invention discloses a sound control method and device for a vehicle cabin and a vehicle. The method comprises the steps that a first sound signal sent by a first passenger in the vehicle is obtained, and position information of a second passenger in the vehicle is obtained; determining a second sound signal based on the first sound signal, the position information of the second passenger and the position information of first sound playing equipment in the vehicle; the first sound playing device is controlled to output a second sound signal, so that interference occurs when the first sound signal and the second sound signal are transmitted to the position where the second passenger is located, and the sound loudness of the position where the second passenger is located is smaller than a preset loudness threshold value. According to the invention, the technical problem of low privacy of conversation in the vehicle cabin is solved.

The invention discloses a song teaching template generation method and system, equipment and a program product. The method comprises the following steps: acquiring song audio information of a target song audio; wherein the song audio information comprises lyrics, lyric timestamps, time points corresponding to paragraphs and audio representation information; performing various intra-sentence teaching feature analysis on the lyric timestamps and the audio representation information of the target song audio, and marking various analyzed intra-sentence teaching features on lyrics; wherein the in-sentence teaching features comprise at least one of accent, treble, long tone, tremolo, gliding and breathing points; the singing difficulty feature comprises at least one of high pitch and long pitch; the skill features comprise at least one of tremolo and glide; on the basis of the time point corresponding to each paragraph and the audio representation information, performing in-segment teaching feature marking on the loudness gradient part of each paragraph in the lyrics of the target song audio; and generating a song teaching template based on the marked lyrics of the target song audio and outputting the song teaching template.

The invention discloses a noise control method and device for a vehicle and the vehicle, and the method comprises the steps: obtaining the parameter value of a target state parameter group of a target vehicle, the target state parameter group comprises a plurality of state parameters, and each state parameter is related to the current noise generated by the vibration of the target vehicle; determining an equipment sound wave signal based on the parameter value of the target state parameter group; and based on the equipment sound wave signal, controlling sound playing equipment of the target vehicle to play sound, so that the current noise sound wave signal interferes with an equipment sound wave signal of the sound playing equipment when being transmitted to a cabin area of the target vehicle, and the noise loudness in the cabin area is smaller than a preset loudness threshold value. According to the invention, the technical problem of large loudness of vehicle noise is solved.

An audio device is provided. The audio device comprises a controller and an acoustic transducer. The controller is configured to receive an input audio signal. The controller is further configured to generate, via a loudness detector, a loudness level of a first portion of the input audio signal. The controller is further configured to identify a compression curve of a plurality of compression curves corresponding to a user volume setting. The controller is further configured to adjust, via an audio compressor, a second portion of the input audio signal based on the loudness level and the compression curve to generate an output audio signal. The loudness level is determined according to LUFS model.

The invention relates to a vehicle-based prompt tone generation method, device and equipment and a storage medium. The method comprises the steps of obtaining preset sound source data, external white noise source data and internal white noise source data of a vehicle; the external white noise source data represents white noise which is collected outside the vehicle and emitted by an external loudspeaker within a preset frequency band range; the in-vehicle white noise source data represents white noise which is collected in the vehicle and emitted by a loudspeaker outside the vehicle within a preset frequency band range; determining a transmission loss frequency band according to the white noise source outside the vehicle and the white noise source inside the vehicle; the transmission loss frequency band represents the frequency band with loudness loss when the white noise is transmitted from the outside of the vehicle to the inside of the vehicle; and generating a prompt tone according to the preset sound source and the transmission loss frequency band. On the basis of the preset sound source, the warning tone is obtained in combination with the isolation condition of the white noise, and noise pollution of the warning tone to people in the vehicle is reduced.

The invention belongs to the technical field of air conditioners, and discloses a noise control method and device, an air conditioner and a heat pump. The noise control method is used for noise control in the operation process of the air conditioner and comprises the steps that S1, noise collection and analysis are conducted, specifically, sound quality parameters of noise are collected and analyzed, and the sound quality parameters comprise the loudness L1, the sharpness S1, the roughness R1 and the fluctuation intensity F1; s2, air conditioner operation state parameter collection, wherein the compressor frequency f, the fan rotating speed n and the electronic expansion valve opening degree in the noise state are collected; s3, setting noise reference parameters including loudness Ljz, sharpness Sjz, roughness Rjz and fluctuation intensity Fjz; and S4, noise comparison and air conditioner operation state adjustment are conducted, specifically, the compressor frequency f, the electronic expansion valve opening degree and the fan rotating speed n are adjusted according to the noise comparison result, and the step S1 is executed after adjustment is completed. The noise control method can control the operation state of the air conditioner, so that the operation noise is reduced, the sound quality of a product is improved, and the use comfort of the air conditioner is improved.

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, a magnetic circuit system of the sound production device comprises a magnetic conductive yoke, and side magnetic parts, a common magnetic part and two central magnetic parts which are arranged on the magnetic conductive yoke, the side magnetic parts are annularly arranged to form an accommodating space, the common magnetic part is located in the accommodating space and is connected with the side magnetic parts, and the two central magnetic parts are arranged in the accommodating space. The central magnetic part is arranged in the accommodating space to divide the accommodating space into two mounting spaces, each central magnetic part is positioned in one mounting space and is separated from the side magnetic part and the common magnetic part to define a magnetic gap, the common magnetic part is provided with a magnetic flux port communicated with the two magnetic gaps, and a voice coil of the vibration system comprises two annular parts and a conduction part connected with the two annular parts. The two annular parts are respectively suspended in the two magnetic gaps, and the conducting part is suspended in the magnetic flux port. According to the sound production device, the size of the voice coil and the magnet volume of the magnetic circuit system are increased, so that the BL value is improved, and the whole machine performance and the sound effect loudness are improved.

The invention relates to a multi-source data fusion-based Ningxia cell noise map construction and evaluation method, which comprises the following steps of: establishing a frequency-variable sound absorption parameter matrix of a building surface based on multi-spectral scanning data and an acoustic database, and combining a burst noise voiceprint recognition result and traffic monitoring data, generating a burst noise influence map through the burst noise space-time correlation model; the real-time sound pressure data and the frequency-variable sound absorption parameter matrix are fused, and a sound field is dynamically reconstructed to generate a noise thermodynamic diagram; and based on a Zwicker loudness model, coupling a burst noise influence map and resident electrocardiogram monitoring data, calculating a composite noise dysphoria index, constructing a noise map in combination with a noise thermodynamic diagram, and carrying out comprehensive evaluation by adopting an entropy weight-TOPSIS algorithm to obtain a noise evaluation result. According to the method, the noise map is constructed through multi-source heterogeneous data fusion, dynamic sound field modeling and physiological and psychological coupling calculation, and evaluation is performed in combination with multi-dimensional indexes, so that precise evaluation of a cell noise environment and scientific dynamic optimization of a noise reduction scheme are realized, and objectivity and pertinence of noise treatment are effectively improved.

Audio content coded for a reference speaker configuration is downmixed to downmix audio content coded for a specific speaker configuration. One or more gain adjustments are performed on individual portions of the downmix audio content coded for the specific speaker configuration. Loudness measurements are then performed on the individual portions of the downmix audio content. An audio signal that comprises the audio content coded for the reference speaker configuration and downmix loudness metadata is generated. The downmix loudness metadata is created based at least in part on the loudness measurements on the individual portions of the downmix audio content.

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electro-acoustic transformation.The sound production device comprises a shell, a magnetic circuit system and a vibration system, a common magnetic part of the magnetic circuit system is located on the outer side of a center magnetic part and is spaced from the center magnetic part to form a first magnetic gap, and side magnetic parts are located on the outer side of the common magnetic part and are spaced from the center magnetic part to form a second magnetic gap; the central magnetic part comprises a first central magnet, a central magnetic conductive plate and a second central magnet which are arranged in a stacked mode, the shared magnetic part comprises a first shared magnet, a shared magnetic conductive plate and a second shared magnet which are arranged in a stacked mode, and an inner ring hole is formed in the center of a vibrating diaphragm of the vibrating system. The inner periphery of the vibrating diaphragm is connected with the magnetic circuit system, the first voice coil corresponds to the first magnetic gap, and the second voice coil corresponds to the second magnetic gap. According to the sound production device, the utilization rate of the magnetic circuit system is effectively improved, and the BL value is improved, so that the loudness and sensitivity of the sound production device are improved.

The present invention discloses a sounding unit, a loudspeaker and an electronic device; wherein the sounding unit comprises a plurality of voice coils which are sequentially arranged in a horizontal direction, and current directions of adjacent voice coils at positions close to each other are opposite; each of the voice coils has a corresponding magnet steel, and polarities of the magnetic steels respectively corresponding to the adjacent voice coils are opposite, so that a force direction of each of the voice coils is the same, ensuring the consistency of the force of a plurality of voice coils; and since the voice coils are split, the force magnitude of the voice coils is effectively improved compared with the existing single voice coil arrangement mode, thereby greatly improving the sensitivity of the sounding unit and increasing the loudness of the sounding unit.

This disclosure falls into the field of audio coding, in particular it is related to the field of providing a framework for providing loudness consistency among differing audio output signals. In particular, the disclosure relates to methods, computer program products and apparatus for encoding and decoding of audio data bitstreams in order to attain a desired loudness level of an output audio signal.

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, each central magnetic part of a magnetic circuit system of the sound production device, edge magnetic parts arranged around the central magnetic part and a common magnetic part are enclosed to form a magnetic gap, and a vibration system comprises a diaphragm assembly, a conductive support chip, at least two voice coils and four centering support chips, the plurality of voice coils are arranged side by side, the voice coils at the two ends are respectively connected with the two corresponding centering support chips along the side-by-side direction of the plurality of voice coils, and the lead parts of the two adjacent voice coils are respectively and electrically connected with the conductive support chips, so that the two adjacent voice coils are arranged in series; the conductive support chip comprises a connecting part and two bonding pad parts, and the projection of the connecting part in the vibration direction of the vibration system is located in the middle of the common magnetic part. According to the sound production device, the conductive support chip is arranged between the two adjacent voice coils, so that the setting volume of the magnet in the magnetic circuit system can be increased, the BL value of the product is improved, and the loudness and sensitivity of the sound production device are further improved.