Moving coil and flat plate combined earphone

Abstract

The invention relates to a moving coil and flat plate combined earphone. A moving coil loudspeaker is used as a bass unit, and a flat plate loudspeaker is used as a mid-high pitch unit; the axial directions of the flat loudspeaker and the moving coil loudspeaker are arranged to be not the same straight line, and preferably, the axial directions of the flat loudspeaker and the moving coil loudspeaker are vertical, so that acoustic interference between the two driving units is effectively reduced, and the sound definition and the positioning accuracy are improved. By installing the sound absorbing material in the shell, resonance and distortion caused by internal sound wave reflection are remarkably reduced, and the overall sound quality is improved. The arrangement of the active frequency divider and the frequency division regulator ensures the smooth transition between the flat horn and the moving coil horn, and realizes accurate frequency division. The open-type moving coil loudspeaker not only improves the low-frequency response, but also improves the overall comfort level. According to the invention, excellent sound performance and comfortable wearing experience are realized, and the earphone is suitable for application scenes of music making, monitoring, high-quality audio appreciation and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of earphones, and in particular to a dynamic-coil and flat-panel combined earphone. Background Art

[0002] With the continuous advancement of audio technology, consumers' demand for high-quality audio experience is growing. Especially in the field of headphones, users not only pursue portability and comfort, but also pay more and more attention to the authenticity and delicacy of sound quality. In order to meet these needs, many types of headphone products have appeared on the market, among which coaxial flat speaker technology has attracted much attention due to its unique design and excellent sound quality performance.

[0003] Coaxial flat speaker technology achieves a more natural and harmonious sound performance by coaxially arranging speakers responsible for different frequency ranges. This technology not only improves the consistency of sound quality, but also deepens the depth of the sound and improves the full-range effect of the headphones, thereby achieving high-standard sound quality.

[0004] For example, JP2023002893U proposes a noise-cancelling headset with a coaxial flat-panel speaker, which achieves consistency and depth of sound quality and improves the full-range effect of the headset by coaxially installing a first dynamic speaker responsible for mid- and low-frequency vibrations and a flat-panel speaker or a second dynamic speaker responsible for mid- and high-frequency vibrations in the headset body;

[0005] CN217721475U discloses a dual-unit module of a dynamic coil and a flat panel speaker, comprising: a first shell and a second shell, wherein the second shell is connected to the front surface of the first shell, and the first shell and the second shell are respectively provided with a first cavity and a second cavity on the rear surface, and the first cavity is connected to the second cavity; a dynamic coil woofer, wherein the dynamic coil woofer is arranged in the first cavity; and a flat panel tweeter, wherein the flat panel tweeter is arranged in the second cavity. It is an acoustic speaker that takes both low and high frequencies into consideration.

[0006] Although coaxial flat speaker technology has achieved certain achievements, it still faces some challenges and shortcomings. For example, coaxial speakers may encounter sound consistency issues in some designs, especially when the transition between different frequency bands is not smooth enough, which may affect the consistency and naturalness of the sound quality. Due to the limited space inside the headphones, the internal reflection of sound waves may cause resonance and distortion, affecting the overall sound quality. The coaxial flat speaker headphones currently on the market often lack the function of automatically adjusting the sound settings according to the user's hearing characteristics, which limits the ability of the headphones to provide a highly personalized listening experience. Summary of the invention

[0007] In order to solve the above problem, the present invention provides a dynamic-planar combination earphone, comprising a housing, a planar speaker and a dynamic speaker, characterized in that the axial direction of the planar speaker and the axial direction of the dynamic speaker are not on the same straight line.

[0008] The dynamic speaker is used as the woofer, and the flat speaker is used as the mid-high frequency unit; the crossover frequency is 400Hz, the dynamic speaker is used for sound below 400Hz, and the flat speaker is used for sound above 400Hz.

[0009] Let the spatial straight line A represent the axial direction of the flat speaker, the spatial straight line B represent the axial direction of the dynamic speaker, and the angle θ represent the minimum angle between the spatial straight line A and the spatial straight line B; then 45°≤θ≤90°.

[0010] The axial direction of the flat speaker and the axial direction of the dynamic speaker are perpendicular to each other in space.

[0011] The flat speaker is installed inside the housing through a flat speaker pad, and the dynamic speaker is directly installed on the housing;

[0012] The flat speaker comprises a flat speaker body and a vibration-proof ring, wherein the flat speaker body is mounted on the vibration-proof ring, and the vibration-proof ring is connected to the flat speaker pad; the vibration-proof ring is a hollow structure, and the sound waves emitted by the dynamic speaker can pass through the hollow structure of the vibration-proof ring;

[0013] Sound-absorbing material is installed at a position on the shell corresponding to the axial direction of the flat speaker, so that the sound emitted by the flat speaker away from the human ear can be absorbed as much as possible by the sound-absorbing material; at the same time, the part of the sound emitted by the dynamic speaker that is bounced off the shell and passes through the main body of the flat speaker can be absorbed as much as possible by the sound-absorbing material.

[0014] The parameters of the sound absorbing material are:

[0015] Sound absorption coefficient: 0.85-0.95 at 1kHz, 0.45-0.50 at 250Hz;

[0016] Density: 12~16kg / m 3 ;

[0017] Thickness: 5-8mm;

[0018] Acoustic impedance: 250~350N·s / m 3 ;

[0019] The anti-vibration ring is made of rubber or silicone material. The parameters of the anti-vibration ring are:

[0020] Damping coefficient: 0.2~0.25;

[0021] Hardness: Shore A45~50;

[0022] Thickness: 1.5-2mm;

[0023] Elastic modulus: 0.7~1Mpa;

[0024] The percentage of the hollowed-out area of ​​the vibration-proof ring to the entire area is greater than 60%.

[0025] It also includes an active frequency divider, a frequency divider regulator and an interface; the interface includes an audio interface and a digital interface, the digital interface is connected to a decoder, the decoder is connected to the active frequency divider; the audio interface is connected to the active frequency divider;

[0026] The active crossover includes a preamplifier and a power amplifier, and has a power amplification function; the active crossover is connected to a flat speaker and a dynamic speaker, the flat speaker is used for mid-high frequency output, and the dynamic speaker is used for low frequency output; the crossover adjuster is connected to the active crossover to adjust the frequency division point of the crossover;

[0027] The active crossover is set up as follows:

[0028] Frequency division point: Initial setting is 400Hz;

[0029] Filter settings: Use Butterworth filter;

[0030] Use a Butterworth second-order high-pass filter to connect the flat speaker, use a Butterworth second-order low-pass filter to connect the dynamic speaker, and use a variable resistor to adjust the frequency division point; the frequency division regulator changes the frequency division point by changing the variable resistor;

[0031] Phase compensation: adding capacitors into the driver’s path after the high-pass filter ensures consistent phase response around the frequency cutoff point;

[0032] The resistors are set to adjust the impedance so that the impedance of each driver matches the headphone output impedance.

[0033] The ratio of the diameter of the flat-panel drive unit to the diameter of the dynamic coil drive unit may be considered to be between 1.2:1 and 1.5:1.

[0034] The dynamic speaker is of open design, and the back of the dynamic speaker is arranged outside the earphone. The sound emitted by the dynamic speaker is freely propagated from the back, reducing the reflection of internal sound waves, thereby reducing resonance and distortion.

[0035] A microprocessor is set in the crossover adjuster, which is connected to the active crossover. It can adjust the crossover parameters according to the hearing data input by the user through the control panel on the headset or the supporting application. The microprocessor has a built-in calibration algorithm to automatically adjust the sound settings according to the user's hearing characteristics, optimize the frequency and phase response, and ensure sound balance. Users can select preset sound effect modes through the control panel or application, and manually adjust the frequency division point.

[0036] Connectors for the flat-panel speaker, shell and earmuffs are provided on the flat-panel speaker pad. The flat-panel speaker and shell are installed on one side of the flat-panel speaker pad, and the earmuffs are installed on the other side of the flat-panel speaker pad. The shells are in pairs, each of which is fixed with a flat-panel speaker and a dynamic speaker, and a head beam assembly is arranged between the two shells.

[0037] The beneficial effects of the present invention are:

[0038] The invention provides a dynamic-planar combination earphone, which effectively reduces the acoustic interference between the two drive units and improves the clarity and positioning accuracy of the sound by setting the axes of the planar speaker (4) and the dynamic speaker (2) to be non-colinear and preferably making the axes of the two perpendicular.

[0039] By installing sound-absorbing material inside the housing (1), the resonance and distortion caused by internal sound wave reflection are significantly reduced, thereby improving the overall sound quality. The use of the vibration-proof ring further reduces the vibration of the flat speaker (4), thereby improving the purity of the sound.

[0040] The anti-vibration ring is set as a hollow structure, which can effectively reduce the vibration generated by the flat speaker (4) during operation, thereby reducing sound distortion. The hollow design allows the sound waves emitted by the dynamic speaker (2) to pass through the anti-vibration ring smoothly, avoiding the reflection and diffraction of the sound waves caused by the obstruction of the anti-vibration ring, and further reducing sound distortion. In addition, the hollow structure also helps to improve the airflow inside the earphone, helps to evenly diffuse the sound, and improves the overall sound quality. Therefore, the design of the hollow anti-vibration ring helps to improve the overall sound performance of the earphone, especially in terms of improving sound clarity and reducing distortion.

[0041] The arrangement of the active crossover and the crossover regulator ensures a smooth transition between the flat speaker (4) and the dynamic speaker (2), and achieves precise frequency division. In particular, a microprocessor is arranged in the crossover regulator, which can automatically adjust the sound settings according to the user's hearing data, providing a highly personalized auditory experience. The dynamic speaker (2) with an open design not only improves the low-frequency response, but also improves the overall comfort. Overall, the present invention achieves excellent sound performance and a comfortable wearing experience, and is particularly suitable for application scenarios such as music production, monitoring, and high-quality audio appreciation.

[0042] By adding a capacitor to the driver path after the high-pass filter, the phase response near the frequency division point is ensured to be consistent, thereby achieving phase alignment between the flat speaker (4) and the dynamic speaker (2). The implementation of phase alignment helps to ensure that the phase responses of the two drive units near the frequency division point are consistent, thereby improving the accuracy of sound and image positioning and the overall coherence of the sound. This is very important for improving the overall sound quality and listening experience of the headphones, especially in multi-channel audio playback, and can provide more natural and realistic sound reproduction. Therefore, the present invention significantly improves the sound quality performance of the headphones through precise phase alignment technology, providing users with a more immersive listening experience.

[0043] The present invention effectively optimizes the sound performance of the headphones by setting the ratio of the diameter of the flat-panel driver unit to the diameter of the dynamic driver unit between 1.2:1 and 1.5:1. Such a diameter ratio design helps to ensure a good match between the flat-panel driver unit and the dynamic driver unit in terms of frequency response and acoustic characteristics, thereby improving the continuity and balance of the sound. The flat-panel driver unit is usually responsible for the mid- and high-frequency bands, while the dynamic driver unit is responsible for the low-frequency band. A reasonable diameter ratio helps to ensure a smooth transition between the two and avoid obvious faults or mutations in the sound. Therefore, by setting a reasonable diameter ratio, the present invention can provide a more natural, balanced and rich sound experience, and is particularly suitable for application scenarios that pursue high-quality audio playback. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0045] Attached Figure 1 This is an appearance diagram of the earphone of the present invention;

[0046] Attached Figure 2 This is an exploded view of the structure of the earphone of the present invention;

[0047] Attached Figure 3 is a side cross-sectional view of the earphone of the present invention;

[0048] Attached Figure 4 FIG. 2 is a schematic diagram of the structure of the earphone of the present invention.

[0049] Among them: shell 1, dynamic speaker 2, interface 3, flat speaker 4, flat speaker pad 5, earmuffs 6, headband assembly. DETAILED DESCRIPTION

[0050] Embodiment 1:

[0051] See also Figure 1-4 The present invention provides a dynamic-planar combination earphone, comprising a housing 1, a planar speaker 4 and a dynamic speaker 2, wherein the axial direction of the planar speaker 4 and the axial direction of the dynamic speaker 2 are not on the same straight line.

[0052] Preferably, let the spatial straight line A represent the axial direction of the flat speaker 4, the spatial straight line B represent the axial direction of the dynamic speaker 2, and the angle θ represent the minimum angle between the spatial straight line A and the spatial straight line B; then 45°≤θ≤90°.

[0053] Further preferably, the axial direction of the flat speaker 4 and the axial direction of the dynamic speaker 2 are perpendicular to each other in space.

[0054] The flat speaker 4 is installed inside the housing 1 through the flat speaker pad 5, and the dynamic speaker 2 is directly installed on the housing 1;

[0055] The flat speaker 4 includes a flat speaker 4 body and a vibration-proof ring. The flat speaker 4 body is mounted on the vibration-proof ring, and the vibration-proof ring is connected to the flat speaker pad 5. The vibration-proof ring is a hollow structure, and the sound waves emitted by the dynamic speaker 2 can pass through the hollow structure of the vibration-proof ring.

[0056] A sound-absorbing material is installed on the outer shell 1 at a position corresponding to the axial direction of the flat speaker 4, so that the sound emitted by the flat speaker 4 away from the human ear can be absorbed as much as possible by the sound-absorbing material; at the same time, the part of the sound emitted by the dynamic speaker 2 that is bounced by the outer shell 1 and passes through the main body of the flat speaker 4 can be absorbed as much as possible by the sound-absorbing material.

[0057] The parameters of the sound absorbing material are:

[0058] Sound absorption coefficient: 0.85-0.95 at 1kHz, 0.45-0.50 at 250Hz;

[0059] Density: 12~16kg / m 3 ;

[0060] Thickness: 5-8mm;

[0061] Acoustic impedance: 250~350N·s / m 3 ;

[0062] The anti-vibration ring is made of rubber or silicone material. The parameters of the anti-vibration ring are:

[0063] Damping coefficient: 0.2~0.25;

[0064] Hardness: Shore A45~50;

[0065] Thickness: 1.5-2mm;

[0066] Elastic modulus: 0.7~1Mpa;

[0067] The percentage of the hollowed-out area of ​​the vibration-proof ring to the entire area is greater than 60%.

[0068] It also includes an active frequency divider, a frequency divider regulator and an interface 3; the interface 3 includes an audio interface and a digital interface, the digital interface is connected to a decoder, the decoder is connected to the active frequency divider; the audio interface is connected to the active frequency divider;

[0069] The active crossover includes a preamplifier and a power amplifier, and has a power amplification function; the active crossover is connected to the flat speaker 4 and the dynamic speaker 2, the flat speaker 4 is used for medium and high frequency output, and the dynamic speaker 2 is used for low frequency output; the crossover regulator is connected to the active crossover to adjust the frequency division point of the crossover;

[0070] The active crossover is set up as follows:

[0071] Frequency division point: Initial setting is 400Hz;

[0072] Filter settings: Use Butterworth filter;

[0073] A Butterworth second-order high-pass filter is used to connect the flat speaker 4, a Butterworth second-order low-pass filter is used to connect the dynamic speaker 2, and a variable resistor is used to adjust the frequency division point; the frequency division regulator changes the frequency division point by changing the variable resistor;

[0074] Phase compensation: adding capacitors into the driver’s path after the high-pass filter ensures consistent phase response around the frequency cutoff point;

[0075] The resistors are set to adjust the impedance so that the impedance of each driver matches the headphone output impedance.

[0076] The ratio of the diameter of the flat-panel drive unit to the diameter of the dynamic coil drive unit may be considered to be between 1.2:1 and 1.5:1.

[0077] The dynamic speaker 2 is of open design, and the back side of the dynamic speaker 2 is arranged outside the earphone. The sound emitted by the dynamic speaker 2 is freely propagated from the back, reducing the reflection of internal sound waves, thereby reducing resonance and distortion.

[0078] A microprocessor is set in the crossover adjuster, which is connected to the active crossover. It can adjust the crossover parameters according to the hearing data input by the user through the control panel on the headset or the supporting application. The microprocessor has a built-in calibration algorithm to automatically adjust the sound settings according to the user's hearing characteristics, optimize the frequency and phase response, and ensure sound balance. Users can select preset sound effect modes through the control panel or application, and manually adjust the frequency division point.

[0079] The flat speaker pad 5 is provided with connectors for the flat speaker 4, the shell 1 and the earmuff 6. The flat speaker 4 and the shell 1 are installed on one side of the flat speaker pad 5, and the earmuff 6 is installed on the other side of the flat speaker pad 5. The shell 1 is in pairs, each shell 1 is fixedly provided with a flat speaker 4 and a dynamic speaker 2, and a head beam assembly 7 is arranged between the two shells 1.

[0080] Embodiment 2:

[0081] This embodiment tests the angle range that is most suitable for the structure of the present invention with respect to different axial angles between the flat speaker 4 and the dynamic speaker 2 .

[0082] Let the space line A represent the axial direction of the flat speaker 4, the space line B represent the axial direction of the dynamic speaker 2, and the angle θ represent the minimum angle between the space line A and the space line B;

[0083] Experimental Materials:

[0084] Headphone prototype: The dynamic-planar combination headphone design described.

[0085] Test audio source: Contains test audio files of different frequency bands.

[0086] Spectrum Analyzer: Used to measure the frequency response and phase response of headphones.

[0087] Subjective Evaluation Panel: An evaluation panel composed of professional audio engineers is responsible for conducting a subjective evaluation of the sound performance of the headphones.

[0088] Experimental methods

[0089] A series of headphone prototypes are prepared, and the angle θ between the axial directions of the planar speaker (4) and the dynamic speaker (2) of each group of prototypes is different, ranging from 0° to 90°, with one sample every 5°.

[0090] Make sure other design parameters are the same for all headphone prototypes, including driver diameter ratios, crossover parameters, etc.

[0091] Frequency response and phase response tests:

[0092] Each set of headphone prototypes was tested for frequency response and phase response using a spectrum analyzer.

[0093] Record the frequency response curve and phase response curve of each headphone prototype at different angles.

[0094] Subjective evaluation:

[0095] An evaluation team composed of professional audio engineers conducted a subjective listening evaluation on each set of headphone prototypes.

[0096] Evaluation indicators include sound clarity, balance, three-dimensionality, etc.

[0097] The subjective evaluation results of each headphone prototype were recorded.

[0098] Data Analysis:

[0099] Perform statistical analysis on the frequency response and phase response test data to find out the changing trends of frequency response and phase response at different angles.

[0100] Combined with the subjective evaluation results, the impact of different angles on the sound performance of headphones is comprehensively analyzed.

[0101] Determine the optimal angle range.

[0102] Experimental Results

[0103] The experimental results are shown in Table I. Frequency response: As the angle increases, the frequency response curve becomes smoother, especially near the crossover frequency point.

[0104] Phase response: When the angle is between 45° and 90°, the phase response curve is the flattest, indicating that the phase alignment effect is best at this time.

[0105] Subjective evaluation: The evaluation team believes that the clarity, balance and three-dimensionality of the sound are best when the angle is between 45° and 90°.

[0106] Table 1 Changes in hearing caused by different fixture ranges

[0107]

[0108]

[0109] Embodiment 3:

[0110] This embodiment tests different diameter ratios of planar headphones and dynamic headphones to determine the optimal ratio range:

[0111] Test Method Process

[0112] Preparation

[0113] Select the test ratio: Select several typical ratios for testing, 1.2:1, 1.3:1, 1.4:1 and 1.5:1.

[0114] Prototype: Prototype the headphones according to the selected proportions.

[0115] Test equipment

[0116] Acoustic test equipment: sound level meter, spectrum analyzer, headphone test bench, etc.

[0117] Simulation software: EARS, FIR Designer and other professional acoustic simulation software.

[0118] Test steps

[0119] Acoustic simulation:

[0120] Use simulation software to simulate the acoustic performance of headphones of different proportions. Record key indicators such as frequency response, phase response and distortion.

[0121] Lab Tests:

[0122] Place the headphone prototype on the headphone test bench. Use a sound level meter and spectrum analyzer to measure frequency response, phase response, distortion, and sound pressure level.

[0123] Record test data.

[0124] User listening test:

[0125] Select a group of testers to audition and collect subjective evaluations. The testers include professionals and ordinary users. Record the user audition feedback.

[0126] Data analysis

[0127] Perform statistical analysis on all test data, including mean and standard deviation. Analyze the performance differences of headphones under different ratios. Consider objective data and user feedback to determine the best ratio.

[0128] Table 2: Objective test results

[0129]

[0130] Table 3: User listening feedback

[0131] Proportion User satisfaction (1-5) Low frequency performance (1-5) Mid-high frequency performance (1-5) Comfort (1-5) 1.2:1 4 4 4.5 4.2 1.3:1 4.5 4.5 4.8 4.5 1.4:1 4.2 4.3 4.7 4.3 1.5:1 4 4.2 4.6 4.1

[0132] According to the test results, the ratio of 1.3:1 performed well in both objective tests and user audition feedback. Specifically, it achieved good results in frequency response, phase response, distortion, and sound pressure level, and also received a high user satisfaction score. Therefore, 1.3:1 is the optimal ratio of the diameter of the flat-panel driver unit to the diameter of the dynamic driver unit.

[0133] Embodiment 4:

[0134] The present invention also tests the influence of the sound absorption coefficient of the sound absorbing material on the earphone.

[0135] Experimental Materials

[0136] Headphone prototype: Based on the previously designed dynamic-planar combination headphones.

[0137] Sound-absorbing material samples: Sound-absorbing material samples with different sound absorption coefficients.

[0138] Acoustic test equipment: sound level meter, spectrum analyzer, headphone test bench, etc.

[0139] Simulation Software: Acoustic simulation software used to simulate the performance of headphones.

[0140] Experimental procedures

[0141] Preparation

[0142] Select sound-absorbing material samples: According to the given sound absorption coefficient range (0.85-0.95 at 1kHz frequency), select several representative sound-absorbing material samples.

[0143] Make a prototype of the earphones: Based on the previous earphone design, make a prototype of the earphones and ensure that all parameters remain unchanged except the sound-absorbing material.

[0144] Test Preparation

[0145] Install sound-absorbing materials: Install sound-absorbing materials with different sound absorption coefficients on the shell at a position corresponding to the axial direction of the flat-panel speaker.

[0146] Set up the test environment: Make sure the test environment meets standard acoustic testing conditions, such as a silent room or anechoic chamber.

[0147] Experimental procedures

[0148] Acoustic simulation:

[0149] Acoustic simulation software is used to simulate headphones equipped with sound-absorbing materials with different sound absorption coefficients.

[0150] Record key metrics such as frequency response, phase response, distortion and sound pressure level.

[0151] Lab Tests:

[0152] Place the headphone prototype on the headphone test bench.

[0153] Use sound level meters and spectrum analyzers to measure frequency response, phase response, distortion, sound pressure level, and more.

[0154] Record test data.

[0155] Data Analysis:

[0156] Perform statistical analysis on all test data, including mean value, standard deviation, etc.

[0157] Analyze the performance differences of headphones under different sound absorption coefficients.

[0158] Comprehensively consider objective data to determine the optimal sound absorption coefficient range.

[0159] Table 4 Objective test results

[0160]

[0161] According to experimental results, good results can be obtained within the range of 0.90 to 0.95. When the sound absorption coefficient is 0.95, the headphones perform best in terms of frequency response, phase response, distortion and sound pressure level. Therefore, the recommended sound absorption coefficient range is 0.90 to 0.95. Within this range, choosing 0.95 headphones can achieve better acoustic performance, including smoother frequency response, lower distortion and higher sound pressure level.

[0162] Thus far, the description of the above-described embodiments is provided for the purpose of illustration and description. It is not intended to be exhaustive or to limit the present disclosure. The individual elements or features of a specific embodiment are generally not subject to the limitations of the specific embodiment, but when applicable, they can be interchanged and used for selected embodiments even if not specifically shown or described. In many respects, the same element or feature also can be changed. This variation is not considered to be a departure from the present disclosure, and all such modifications are intended to be included in the scope of the present disclosure.

[0163] Example embodiments are provided so that the present disclosure will be thorough and the scope will be fully conveyed to those skilled in the art. In order to thoroughly understand the embodiments of the present disclosure, numerous details are set forth, such as examples of specific parts, devices, and methods. Obviously, for those skilled in the art, it is not necessary to use specific details, the example embodiments can be implemented in many different forms, and neither should be construed as limiting the scope of the present disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0164] Here, specialized vocabulary is used only for the purpose of describing specific example embodiments, and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a" and "the" used herein may be intended to include plural forms as well. The terms "including" and "having" are inclusive, and therefore specify the presence of the claimed features, wholes, steps, operations, elements and / or components, but do not exclude the presence or additional presence of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof. Unless the order of execution is clearly indicated, the method steps, processing and operations described herein are not interpreted as necessarily needing to be performed in the specific order discussed and shown. It should also be understood that additional or optional steps may be adopted.

Claims

1. A dynamic-flat panel combination earphone, comprising a housing (1), a flat panel speaker (4) and a dynamic speaker (2), characterized in that: The axial direction of the flat speaker (4) and the axial direction of the dynamic speaker (2) are not on the same straight line; The dynamic speaker is used as the woofer, and the flat speaker is used as the mid-high frequency unit; the crossover frequency is 400Hz, the dynamic speaker is used for sound below 400Hz, and the flat speaker is used for sound above 400Hz.

2. The dynamic flat panel combination earphone according to claim 1, characterized in that: Let the spatial straight line A represent the axial direction of the flat speaker (4), the spatial straight line B represent the axial direction of the dynamic speaker (2), and the angle θ represent the minimum angle between the spatial straight line A and the spatial straight line B; then 45°≤θ≤90°.

3. The dynamic flat panel combination earphone according to claim 2, characterized in that: The axial direction of the flat speaker (4) and the axial direction of the dynamic speaker (2) are perpendicular to each other in space.

4. The dynamic flat panel combination earphone according to any one of claims 1 to 3, characterized in that: The flat speaker (4) is installed inside the housing (1) via a flat speaker pad (5), and the dynamic speaker (2) is directly installed on the housing (1); The flat speaker (4) comprises a flat speaker (4) body and a vibration-proof ring, wherein the flat speaker (4) body is mounted on the vibration-proof ring, and the vibration-proof ring is connected to the flat speaker pad (5); the vibration-proof ring is a hollow structure, and the sound waves emitted by the dynamic speaker (2) can pass through the hollow structure of the vibration-proof ring; A sound-absorbing material is installed on the housing (1) at a position corresponding to the axial direction of the flat speaker (4), so that as much sound as possible is emitted from the side of the flat speaker (4) away from the human ear and absorbed by the sound-absorbing material; at the same time, as much sound as possible is emitted from the dynamic speaker (2) and bounced off the housing (1) and then passed through the main body of the flat speaker (4) and absorbed by the sound-absorbing material.

5. The dynamic flat panel combination earphone according to claim 4, characterized in that: The parameters of the sound absorbing material are: Sound absorption coefficient: 0.85-0.95 at 1kHz, 0.45-0.50 at 250Hz; Density: 12~16kg / m 3 ; Thickness: 5-8mm; Acoustic impedance: 250~350N·s / m 3 ; The anti-vibration ring is made of rubber or silicone material. The parameters of the anti-vibration ring are: Damping coefficient: 0.2~0.25; Hardness: Shore A45~50; Thickness: 1.5-2mm; Elastic modulus: 0.7~1Mpa; The percentage of the hollowed-out area of ​​the vibration-proof ring to the entire area is greater than 60%.

6. The dynamic flat panel combination earphone according to claim 4, characterized in that: It also includes an active frequency divider, a frequency divider regulator and an interface (3); the interface (3) includes an audio interface and a digital interface, the digital interface is connected to a decoder, the decoder is connected to the active frequency divider; the audio interface is connected to the active frequency divider; The active frequency divider comprises a preamplifier and a power amplifier, and has a power amplification function; the active frequency divider is connected to a flat speaker (4) and a dynamic speaker (2), the flat speaker (4) is used for medium and high frequency output, and the dynamic speaker (2) is used for low frequency output; the frequency divider regulator is connected to the active frequency divider, and regulates the frequency division point of the frequency divider; The active crossover is set up as follows: Frequency division point: Initial setting is 400Hz; Filter settings: Use Butterworth filter; A Butterworth second-order high-pass filter is used to connect the flat speaker (4), a Butterworth second-order low-pass filter is used to connect the dynamic speaker (2), and a variable resistor is used to adjust the frequency division point; the frequency division regulator changes the frequency division point by changing the variable resistor; Phase compensation: adding capacitors into the driver’s path after the high-pass filter ensures consistent phase response around the frequency cutoff point; The resistors are set to adjust the impedance so that the impedance of each driver matches the headphone output impedance.

7. The dynamic flat panel combination earphone according to claim 4, characterized in that: The ratio of the diameter of the flat-panel drive unit to the diameter of the dynamic coil drive unit may be considered to be between 1.2:1 and 1.5:

1.

8. The dynamic flat panel combination earphone according to claim 4, characterized in that: The dynamic speaker (2) is of open design, and the back side of the dynamic speaker (2) is arranged outside the earphone. The sound emitted by the dynamic speaker (2) is freely propagated from the back, reducing the reflection of internal sound waves, thereby reducing resonance and distortion.

9. The dynamic flat panel combination earphone according to claim 6, characterized in that: A microprocessor is set in the crossover adjuster, which is connected to the active crossover. It can adjust the crossover parameters according to the hearing data input by the user through the control panel on the headset or the supporting application. The microprocessor has a built-in calibration algorithm to automatically adjust the sound settings according to the user's hearing characteristics, optimize the frequency and phase response, and ensure sound balance. Users can select preset sound effect modes through the control panel or application, and manually adjust the frequency division point.

10. The dynamic flat panel combination earphone according to claim 6, characterized in that: A connecting piece for a flat speaker (4), a housing (1) and an earmuff (6) is provided on a flat speaker pad (5); the flat speaker (4) and the housing (1) are installed on one side of the flat speaker pad (5), and the earmuff (6) is installed on the other side of the flat speaker pad (5); the housings (1) are in pairs, each housing (1) is fixedly provided with a flat speaker (4) and a dynamic speaker (2), and a head beam assembly (7) is provided between the two housings (1).

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