New patent application published for: ACOUSTIC STRUCTURE AND DRIVING METHOD OF DIRECT-DRIVE SIX-SPEAKER HEADPHONE

ACOUSTIC STRUCTURE AND DRIVING METHOD OF DIRECT-DRIVE SIX-SPEAKER HEADPHONE

Claims

1. An acoustic structure of a direct-drive six-speaker headphone, comprising: two speaker plates symmetrically arranged on left and right sides respectively, each of the speaker plates on both sides being provided with: a main speaker, configured to play a main audio signal, the main audio signal being formed by combining a subwoofer-channel signal, a center-front-channel signal, and a single front-channel signal; a first auxiliary speaker, configured to play a single side-channel signal; and a second auxiliary speaker, configured to play a single rear-channel signal; wherein a center of the main speaker is offset from a plate center of the speaker plate, a distance between the first auxiliary speaker and the main speaker is smaller than a distance between the second auxiliary speaker and the main speaker; a center of the main speaker is located at a lower front position relative to the plate center, a center of the first auxiliary speaker is located at an upper front position relative to the plate center, a center of the second auxiliary speaker is located at an upper rear position relative to the plate center, and a distance from the center of the main speaker to the plate center is smaller than a distance from the center of the first auxiliary speaker to the plate center, and the distance from the center of the main speaker to the plate center is smaller than a distance from the center of the second auxiliary speaker to the plate center; the first auxiliary speaker and the second auxiliary speaker both are disposed in sealed cavities on the speaker plate, outer sides of the first auxiliary speaker and the second auxiliary speaker are respectively provided with sealing covers, the sealing covers are located at a rear side of the speaker plate and enclose the sealed cavities, such that the speakers are disposed inside the sealing covers and the speakers are sealed and isolated from each other.
2. The acoustic structure of a direct-drive six-speaker headphone according to claim 1, wherein a surface of the speaker plate facing away from a sound emitting side is configured as an arcuate surface, the arcuate surface having an arcuate low point; speaker planes of the main speaker, the first auxiliary speaker, and the second auxiliary speaker all being inclined toward the arcuate low point.
3. The acoustic structure of a direct-drive six-speaker headphone according to claim 2, wherein inclination angles of the main speaker, the first auxiliary speaker, and the second auxiliary speaker are all equal.
4. The acoustic structure of a direct-drive six-speaker headphone according to claim 2, wherein in a left-right direction, a distance from a center of the main speaker to the arcuate low point, a distance from a center of the first auxiliary speaker to the arcuate low point, and a distance from a center of the second auxiliary speaker to the arcuate low point are all equal.
5. The acoustic structure of a direct-drive six-speaker headphone according to claim 1, wherein the speaker plate has a vertical use center line, and the first auxiliary speaker and the second auxiliary speaker are respectively disposed on two sides of the vertical use center line.
6. The acoustic structure of a direct-drive six-speaker headphone according to claim 2, wherein the main speaker has a sound pressure level of 110 dB±10 dB, a frequency response of 20 Hz-20 kHz±10 dB, and a lowest resonant frequency of 80 Hz; the first auxiliary speaker and the second auxiliary speaker have identical specifications, and the first auxiliary speaker has a sound pressure level of 110 dB±10 dB, a frequency response of 20 Hz-20 kHz±10 dB, and a lowest resonant frequency of 240 Hz.
7. The acoustic structure of a direct-drive six-speaker headphone according to claim 1, wherein a surface of the speaker plate 100 facing user's ear is defined as a sound-emitting vertical plane, and an orthographic projection contour of the speaker plate on the sound-emitting vertical plane adopts a circular, elliptical, or obround shape.
8. The acoustic structure of a direct-drive six-speaker headphone according to claim 7, wherein the orthographic projection of the speaker plate is circular, with a diameter of 90 mm, the main speaker employs a speaker with a diameter of Ø 40 mm or Ø 50 mm, and the first auxiliary speaker and the second auxiliary speaker employ speakers with a diameter of Ø 20 mm or Ø 30 mm.
9. The acoustic structure of a direct-drive six-speaker headphone according to claim 8, wherein a straight line vertically passing through the plate center is defined as a vertical use center line, a straight line horizontally passing through the plate center is defined as a horizontal use center line; a distance from a center of the main speaker to the vertical use center line is 6.2 mm with an offset within ±30%; a distance from the center of the main speaker to the horizontal use center line is 16.2 mm with an offset within ±30%; and/or a distance from a center of the first auxiliary speaker to the vertical use center line is 25.9 mm with an offset within ±30%, and a distance from the center of the first auxiliary speaker to the horizontal use center line is 22.4 mm with an offset within ±30%; and/or a distance from a center of the second auxiliary speaker to the vertical use center line is 17.1 mm with an offset within ±30%, and a distance from the center of the second auxiliary speaker to the horizontal use center line is 27.6 mm with an offset within ±30%.
10. A driving method of a direct-drive six-speaker head-mounted headphone, for the acoustic structure of a direct-drive six-speaker headphone according to claim 1, the driving method comprising the steps of: receiving a multi-channel audio signal and separating individual audio channel signals therefrom, wherein the individual audio channels at least comprise: a subwoofer-channel signal, a center-front-channel signal, a single front-channel signal, a single side-channel signal, and a single rear-channel signal; individually performing characteristic processing on each of the individual audio channel signals, and combining the processed subwoofer-channel signal, center-front-channel signal, and single front-channel signal into a main channel signal; and outputting the main channel signal to a main speaker on a corresponding side, outputting the processed single side-channel signal to a first auxiliary speaker on the corresponding side, and outputting the processed rear-channel signal to a second auxiliary speaker on the corresponding side.
11. The driving method according to claim 10, wherein the step of individually performing characteristic processing on each of the audio channel signals specifically comprises: supplementing frequency points of the channel signal through a spectral sub-algorithm according to a frequency response characteristic of the speaker, to obtain a high-fidelity restored signal; adjusting phase parameters of the high-fidelity restored signal through a phase sub-algorithm according to position and inclination angle characteristics of the speaker, to eliminate power cancellation and frequency mixing caused by sound phase misalignment; performing an emission angle adjustment on the phase-adjusted high-fidelity restored signal through an angle sub-algorithm, so that sound energy is focused on an ear; adjusting time characteristics of the emission-angle-adjusted high-fidelity restored signal through a delay sub-algorithm based on time differences caused by positional angles and signal processing, so that multi-channel sounds entering the ear are synchronized; and adjusting a volume of the time-characteristic-adjusted high-fidelity restored signal through a gain sub-algorithm, to match sensitivity of the corresponding speaker.
12. The driving method according to claim 10, wherein the step of receiving the multi-channel audio signal and separating the individual audio channel signals therefrom, a multi-channel audio signal is directly obtained from an external audio output interface via a USB interface.
13. A driving method of a direct-drive six-speaker head-mounted headphone, comprising the steps of: receiving a multi-channel audio signal and separating individual audio channel signals therefrom, wherein the individual audio channels at least comprise: a subwoofer-channel signal, a center-front-channel signal, a single front-channel signal, a single side-channel signal, and a single rear-channel signal; individually performing characteristic processing on each of the individual audio channel signals, and combining the processed subwoofer-channel signal, center-front-channel signal, and single front-channel signal into a main channel signal; and outputting the main channel signal to a main speaker on a corresponding side of the headphone, outputting the processed single side-channel signal to a first auxiliary speaker on the corresponding side, and outputting the processed rear-channel signal to a second auxiliary speaker on the corresponding side.
14. The driving method according to claim 13, wherein the step of individually performing characteristic processing on each of the individual audio channel signals specifically comprises: supplementing frequency points of the channel signal through a spectral sub-algorithm according to a frequency response characteristic of the speaker, to obtain a high-fidelity restored signal; adjusting phase parameters of the high-fidelity restored signal through a phase sub-algorithm according to position and inclination angle characteristics of the speaker, to eliminate power cancellation and frequency mixing caused by sound phase misalignment; performing an emission angle adjustment on the phase-adjusted high-fidelity restored signal through an angle sub-algorithm; adjusting time characteristics of the emission-angle-adjusted high-fidelity restored signal through a delay sub-algorithm based on time differences caused by positional angles and signal processing; and adjusting a volume of the time-characteristic-adjusted high-fidelity restored signal through a gain sub-algorithm, to match sensitivity of the corresponding speaker.
15. The driving method according to claim 14, wherein the step of individually performing characteristic processing on each of the individual audio channel signals further comprises: combining the subwoofer-channel signal, the center-front-channel signal, and the single front-channel signal after being subjected to the characteristic processing into a main channel signal.
16. The driving method according to claim 13, wherein the step of receiving the multi-channel audio signal and separating the individual audio channel signals therefrom, a multi-channel audio signal is directly obtained from an external audio output interface via a direct-drive connector.
17. The driving method according to claim 16, wherein the direct-drive connector is a USB interface, a fiber optic, or an HDMI interface.