New Chinese style sound equipment, multi-band sound field construction method and acoustic performance debugging method

Abstract

The invention discloses a new Chinese style sound box, a multi-band sound field construction method and an acoustic performance debugging method. A new Chinese style sound box comprises a floor stand, a bass box body and an upper box body. The bass box body comprises a bass box body main body and two bass box body door plates rotationally connected with the bass box body main body; the bass box body further comprises two handles, two first decorating parts and four second decorating parts, each bass box body door plate is provided with one handle and two second decorating parts, and the handles are fixedly connected with the bass box body door plates and the first decorating parts at the same time. The new Chinese style sound equipment, the multi-band sound field construction method and the acoustic performance debugging method disclosed by the invention have the beneficial effects that the overall bearing effect is improved while the new Chinese style aesthetic style is achieved; a multi-band fusion sound field which coincides in the vertical direction and is coherent in the horizontal direction is constructed at the preset listening position; the frequency response curve meets a preset smoothness threshold value.

Description

Technical Field

[0001] This invention belongs to the field of audio, specifically relating to new Chinese-style audio equipment, multi-band sound field construction methods, and acoustic performance tuning methods. Background Technology

[0002] The patent, with publication number CN212696152U, is entitled "Utility Model Patent for a Home Theater Split-Type Audio Equipment" and IPC classification number H04R1 / 02. Its technical solution discloses that "a second speaker is installed to the right of the first speaker. A fixing plate is installed at the bottom of both the first and second speakers. A base is installed at the lower part of the fixing plate. A cavity is opened at the upper part of the base and on the end face close to the fixing plate. Multiple shock-absorbing pads are installed inside the cavity. Support legs are welded and installed at the four corners of the lower part of the base. Shock-absorbing springs are sleeved on the outer side of the support legs. A groove is opened at the right end of the lower base of the first speaker, and a connecting rod is telescopically installed in the groove. A connecting groove is opened at the left end of the lower base of the second speaker, and the connecting rod fits into the connecting groove."

[0003] Therefore, the above utility model patents have disclosed one technical solution for home theater split-type audio equipment. However, the technical solutions disclosed in these utility model patents focus on achieving effective vibration reduction of the audio system through a multi-level damping structure, but do not further address issues such as improving the overall load-bearing capacity while maintaining a modern Chinese aesthetic style; constructing a multi-band fusion sound field with vertical overlap and horizontal continuity at preset listening positions; and ensuring that the frequency response curve meets preset smoothness thresholds. These issues require further improvement. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a new Chinese-style audio system, a multi-band sound field construction method, and an acoustic performance tuning method.

[0005] This invention adopts the following technical solution: a new Chinese-style audio system, comprising a floor stand, a subwoofer enclosure, and an upper enclosure, wherein: The subwoofer enclosure includes a subwoofer enclosure body and two subwoofer enclosure door panels rotatably connected to the subwoofer enclosure body; the subwoofer enclosure also includes two handles, two first decorative pieces and four second decorative pieces, each subwoofer enclosure door panel is provided with one handle and two second decorative pieces, the handle is fixedly connected to both the subwoofer enclosure door panel and the first decorative pieces, the handle is located between the subwoofer enclosure door panel and the first decorative pieces, and the second decorative pieces are away from the first decorative pieces and fixedly connected to the subwoofer enclosure door panel; The upper housing includes a side panel and a handle, a top plate, and a bottom plate that are fixedly connected to the side panel. The side panel, top plate, and bottom plate together form a closed receiving cavity. The upper housing also includes a front-end module, which is built into the closed receiving cavity and is fixedly connected to the side panel.

[0006] As a preferred technical solution to the above technical solutions, the second decorative component is located at the junction of the subwoofer enclosure door panel and the subwoofer enclosure body.

[0007] As a preferred technical solution to the above technical solutions, the subwoofer enclosure includes two sound guide tubes and two subwoofers. There is a gap between the sound guide tubes and the subwoofers. Both the sound guide tubes and the subwoofers are located at the bottom of the subwoofer enclosure and are embedded in the subwoofer enclosure.

[0008] As a preferred technical solution to the above technical solutions, the subwoofer enclosure also includes two junction boxes, which are located on the side of the subwoofer enclosure and embedded within it.

[0009] As a preferred technical solution to the above technical solutions, the upper enclosure also includes two tweeters and four midrange speakers. The tweeters and midrange speakers are all built into a closed receiving cavity, and the tweeters and midrange speakers are respectively fixedly connected to the inner surface of the enclosure.

[0010] This invention employs the following technical solution: a multi-band sound field construction method, applied to any one of the above technical solutions for a new Chinese-style audio system. The preamp module of the new Chinese-style audio system is specifically implemented as an audio processing circuit, which integrates a crossover processing unit and a signal delay unit. The multi-band sound field construction method includes the following steps: Step S1: Receive the audio input signal through the pre-amplifier module and perform frequency division processing on the audio input signal to separate the audio input signal into low-frequency signal, mid-frequency signal and high-frequency signal; Step S2: Transmit the low-frequency signal to the woofer in the subwoofer enclosure, and transmit the mid-frequency and high-frequency signals to the midrange and tweeters in the upper enclosure. Step S3: Obtain the vertical installation height difference between the subwoofer enclosure and the upper enclosure, and calculate the sound path difference between the subwoofer, midrange speaker, and tweeter when they reach the preset listening position based on the height difference; Step S4: Based on the sound path difference, delay processing is performed on the mid-frequency and high-frequency signals transmitted to the upper enclosure to compensate for the sound output time difference between the woofer, mid-range speaker, and tweeter; Step S5: Control the woofer, midrange speaker and tweeter to emit sound synchronously, and build a multi-band blended sound field that overlaps vertically and is continuous horizontally at the preset listening position of the new Chinese-style audio system.

[0011] As a preferred technical solution to the above technical solutions, the frequency division point setting in step S1 includes the following steps: Signals with frequencies below 200Hz are classified as low-frequency signals. Signals with frequencies between 200Hz and 2000Hz are classified as intermediate frequency signals; Signals with frequencies higher than 2000Hz are classified as high-frequency signals; The audio processing circuit is specifically implemented as a digital signal processing chip, which performs active frequency division on the audio input signal.

[0012] As a preferred technical solution to the above technical solutions, in step S4, while performing delay processing on the intermediate frequency signal and the high frequency signal, phase correction is also performed on the intermediate frequency signal and the high frequency signal. The phase correction includes the following steps: By adjusting the Q value of the filter in the digital signal processing chip, the phase curves near the crossover point between the mid-frequency band and the low-frequency band can be kept smoothly connected.

[0013] This invention employs the following technical solution, an acoustic performance tuning method, applicable to any one of the above technical solutions in a new Chinese-style audio system. The preamplifier module of the new Chinese-style audio system is specifically implemented as an audio processing circuit, which integrates a crossover processing unit and a signal delay unit. The acoustic performance tuning method includes the following steps: Step T1: Establish a communication connection between the debugging terminal and the front-end module; Step T2: Control the new Chinese-style audio system to play preset test signals, including sweep frequency signals and pink noise signals; Step T3: The actual response signal of the new Chinese-style audio system at the preset listening position is collected by the sound pickup device; Step T4: Analyze the actual response signal and calculate the smoothness index of the frequency response curve and the low-frequency standing wave ratio; Step T5: Determine whether the frequency response curve meets the preset smoothness threshold. If not, generate a parameter adjustment command and send it to the front-end module. Step T6: The front-end module automatically adjusts the gain value and crossover point parameters of the corresponding frequency band according to the parameter adjustment command, and then repeats step T1 until the frequency response curve meets the preset smoothness threshold.

[0014] As a preferred technical solution to the above technical solutions, step T4 further includes the following steps: Identify the reflection characteristics of the acoustic environment in which the new Chinese-style audio system is located; When a frequency response peak caused by reflections from the cabinet surface or indoor furniture is detected in the mid-to-high frequency band, the gain of the corresponding frequency band is automatically reduced to counteract the effect of the reflecting surface on the sound field.

[0015] The invention discloses a new Chinese-style audio system, a multi-band sound field construction method, and an acoustic performance tuning method. Its beneficial effects are that it improves the overall load-bearing capacity while possessing a new Chinese aesthetic style; it constructs a multi-band fusion sound field with vertical overlap and horizontal continuity at preset listening positions; and the frequency response curve meets the preset smoothness threshold. Attached Figure Description

[0016] Figure 1This is a color illustration of this application.

[0017] Figure 2 This is a color illustration of this application.

[0018] Figure 3 This is a perspective view of this application.

[0019] Figure 4 This is a three-dimensional view from another perspective of this application.

[0020] Figure 5 This is a side view of this application.

[0021] Figure 6 This is the main view of this application.

[0022] Figure 7 It is along Figure 6 A three-dimensional sectional view along the AA direction.

[0023] Figure 8 This is a three-dimensional schematic diagram of the upper housing of this application from one perspective.

[0024] Figure 9 This is a three-dimensional schematic diagram of the upper housing from another perspective of this application.

[0025] The attached reference numerals include: 100-floor stand; 200-subwoofer enclosure; 201-subwoofer enclosure body; 202-subwoofer enclosure door panel; 210-sound guide tube; 220-subwoofer speaker; 230-junction box; 240-handle; 250-first decorative piece; 260-second decorative piece; 300-upper enclosure; 301-closed housing; 310-preamp module; 320-tweeter; 330-midrange speaker; 340-handle; 350-top panel; 360-side panel; 370-bottom plate. Detailed Implementation

[0026] This invention discloses a new Chinese-style audio system, a multi-band sound field construction method, and an acoustic performance tuning method. The following description, in conjunction with a preferred embodiment (Example 1), is shown in the accompanying drawings. Figures 1 to 9 The specific embodiments of the present invention will be further described below.

[0027] See attached diagram. Figures 1 to 9 , Figures 1 to 7 These images showcase the new Chinese-style audio system from different perspectives. Figure 8 and Figure 9 The upper box structure is shown from different perspectives.

[0028] Example 1.

[0029] Preferably, the new Chinese-style audio system includes a floor stand 100, a subwoofer enclosure 200, and an upper enclosure 300, wherein: The subwoofer enclosure 200 includes a subwoofer enclosure body 201 and two subwoofer enclosure door panels 202 rotatably connected to the subwoofer enclosure body 201. The subwoofer enclosure 200 also includes two handles 240, two first decorative pieces 250, and four second decorative pieces 260. Each subwoofer enclosure door panel 202 has one handle 240 and two second decorative pieces 260. The handle 240 is fixedly connected to both the subwoofer enclosure door panel 202 and the first decorative pieces 250. The handle 240 is located between the subwoofer enclosure door panel 202 and the first decorative pieces 250. The second decorative pieces 260 are located away from the first decorative pieces 250 and are fixedly connected to the subwoofer enclosure door panel 202. This allows the floor stand 100, the first decorative pieces 250, and the second decorative pieces 260 to form an overall structure with a new Chinese aesthetic style. It also facilitates the stacking of the floor stand 100, the subwoofer enclosure 200, and the upper enclosure 300 from bottom to top, improving the overall load-bearing capacity. The upper housing 300 includes a surrounding panel 360 and a handle 340, a top plate 350, and a bottom plate 370, which are fixedly connected to the surrounding panel 360. The surrounding panel 360, the top plate 350, and the bottom plate 370 together form a closed receiving cavity 301. The upper housing 300 also includes a front-end module 310, which is built into the closed receiving cavity 301 and is fixedly connected to the surrounding panel 360.

[0030] The second decorative element 260 is located at the junction of the subwoofer enclosure door panel 202 and the subwoofer enclosure body 201; so that while both the second decorative element 260 and the first decorative element 250 are located on the subwoofer enclosure door panel 202, the second decorative element 260 is as far away from the first decorative element 250 as possible; that is, the second decorative element 260 is located at the extreme position far away from the first decorative element 250.

[0031] The subwoofer enclosure 200 includes two sound guide tubes 210 and two subwoofers 220. There is a gap between the sound guide tubes 210 and the subwoofers 220. The sound guide tubes 210 and the subwoofers 220 are both located at the bottom of the subwoofer enclosure 200 and are both embedded in the subwoofer enclosure 200, so that the subwoofers 220 and the sound guide tubes 210 are both facing the floor stand 100.

[0032] The subwoofer enclosure 200 also includes two junction boxes 230, which are located on the side of the subwoofer enclosure 200 and embedded within it.

[0033] The upper enclosure 300 also includes two tweeters 320 and four midrange speakers 330. The tweeters 320 and midrange speakers 330 are all built into the enclosed receiving cavity 301. The tweeters 320 and midrange speakers 330 are respectively fixedly connected to the inner surface of the enclosure 360.

[0034] Specifically, the front-end module 310 is implemented as a Bluetooth module, so as to further enable Bluetooth connection with external devices.

[0035] Example 2.

[0036] Example 2 includes all the technical solutions of Example 1. Example 2 also includes the following technical solutions.

[0037] Preferably, the preamplifier module 310 is specifically implemented as an audio processing circuit, which integrates a frequency division processing unit and a signal delay unit.

[0038] Preferably, the multi-band sound field construction method applied to any technical solution of the new Chinese-style audio system includes the following steps: Step S1: Receive the audio input signal through the preamplifier module 310 and perform frequency division processing on the audio input signal to separate the audio input signal into low-frequency signal, mid-frequency signal and high-frequency signal; Step S2: Transmit the low-frequency signal to the woofer 220 inside the woofer enclosure 200, and transmit the mid-frequency and high-frequency signals to the midrange speaker 330 and tweeter 320 inside the upper enclosure 300. Step S3: Obtain the vertical installation height difference between the subwoofer enclosure 200 and the upper enclosure 300, and calculate the sound path difference between the subwoofer 220, midrange speaker 330, and tweeter 320 when they reach the preset listening position based on the height difference. Step S4: Based on the sound path difference, the mid-frequency and high-frequency signals transmitted to the upper enclosure 300 are delayed to compensate for the sound emission time difference between the woofer 220, mid-range speaker 330, and tweeter 320. Step S5: Control the woofer 220, midrange speaker 330 and tweeter 320 to emit sound synchronously, and construct a multi-band fusion sound field that overlaps vertically and is continuous horizontally at the preset listening position of the new Chinese-style audio system.

[0039] In step S1, the frequency division point setting for frequency division processing includes the following steps: Signals with frequencies below 200Hz are classified as low-frequency signals. Signals with frequencies between 200Hz and 2000Hz are classified as intermediate frequency signals; Signals with frequencies higher than 2000Hz are classified as high-frequency signals; The audio processing circuit is specifically implemented as a digital signal processing chip, which performs active frequency division on the audio input signal, thereby separating the audio input signal into low-frequency, mid-frequency, and high-frequency signals.

[0040] In step S4, while performing delay processing on the intermediate frequency (IF) and high frequency (HF) signals, phase correction is also performed on the IF and HF signals. The phase correction includes the following steps: By adjusting the Q value of the filter in the digital signal processing chip, the phase curves near the crossover point between the mid-frequency and low-frequency bands are kept smoothly connected, thereby eliminating phase interference caused by the split-type enclosure structure.

[0041] Step S2 further includes the following steps: The subwoofer 220 and the sound tube 210 work together to enhance the depth of the low-frequency sound field by utilizing the reflection effect between the floor stand and the ground. The opening of the sound guide tube 210 faces the floor stand 100, and the diffusion surface formed by the floor stand 100 radiates low-frequency sound waves in all directions to create an all-round low-frequency ambient sound field.

[0042] Step S5 further includes the following steps: Based on the placement of the new Chinese-style audio system, the gain parameters of the high-frequency signal are adjusted, and the acoustic damping characteristics of the closed enclosure 301 are used to suppress the standing waves inside the upper cabinet 300, ensuring that the sound field has bright resolution and accurate positioning in the mid-to-high frequency range.

[0043] Example 3.

[0044] Preferably, the preamplifier module 310 is specifically implemented as an audio processing circuit, which integrates a frequency division processing unit and a signal delay unit.

[0045] Example 3 includes all the technical solutions of Example 2. Example 3 also includes the following technical solutions.

[0046] Preferably, the acoustic performance tuning method applied to any technical solution of the new Chinese-style audio system includes the following steps: Step T1: Establish a communication connection between the debugging terminal (not shown in the figure) and the front-end module 310; Step T2: Control the new Chinese-style audio system to play preset test signals, including sweep frequency signals and pink noise signals; Step T3: The actual response signal of the new Chinese-style audio system at the preset listening position is collected by the sound pickup device (not shown in the figure); Step T4: Analyze the actual response signal and calculate the smoothness index of the frequency response curve and the low-frequency standing wave ratio; Step T5: Determine whether the frequency response curve meets the preset smoothness threshold. If it does not meet the threshold, generate a parameter adjustment command and send it to the front-end module 310. Step T6: The front-end module automatically adjusts the gain value and crossover point parameters of the corresponding frequency band according to the parameter adjustment command, and then repeats step T1 (and further executes step T2 and its subsequent steps sequentially from step T1) until the frequency response curve meets the preset smoothness threshold.

[0047] Step T4 further includes the following steps: Identify the reflection characteristics of the acoustic environment in which the new Chinese-style audio system is located; When a frequency response peak caused by reflections from the cabinet surface or indoor furniture is detected in the mid-to-high frequency band, the gain of the corresponding frequency band is automatically reduced to counteract the effect of the reflecting surface on the sound field.

[0048] Step T6 further includes the following steps: Detect the boundary gain of the subwoofer enclosure 200; If the low-frequency sound pressure level is detected to be too high, the output level of the woofer in the subwoofer enclosure 200 is reduced by the preamp module 310, or the slope of the low-pass filter of the preamp module 310 is adjusted to avoid low-frequency booming.

[0049] Specifically, step T3 is implemented as follows: The preset listening position and multiple auxiliary positions that deviate from the standard listening position by a preset angle are all set as sampling points, and signals are collected at each sampling point. The difference in sound pressure level between different sampling points is calculated, and the directivity of the midrange speaker 330 and tweeter 320 in the upper enclosure 300 is adjusted through the preamp module 310. This ensures the sound field effect at the preset listening position of the new Chinese-style audio system.

[0050] It is worth mentioning that the specific structure and other technical features of the tweeter 320 involved in this patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated in detail.

[0051] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A new type of Chinese-style audio system, characterized in that: Includes floor stand, subwoofer enclosure, and top enclosure, among which: The subwoofer enclosure includes a subwoofer enclosure body and two subwoofer enclosure door panels rotatably connected to the subwoofer enclosure body; the subwoofer enclosure also includes two handles, two first decorative pieces and four second decorative pieces, each subwoofer enclosure door panel is provided with one handle and two second decorative pieces, the handle is fixedly connected to both the subwoofer enclosure door panel and the first decorative pieces, the handle is located between the subwoofer enclosure door panel and the first decorative pieces, and the second decorative pieces are away from the first decorative pieces and fixedly connected to the subwoofer enclosure door panel; The upper housing includes a side panel and a handle, a top plate, and a bottom plate that are fixedly connected to the side panel. The side panel, top plate, and bottom plate together form a closed receiving cavity. The upper housing also includes a front-end module, which is built into the closed receiving cavity and is fixedly connected to the side panel.

2. The new Chinese-style audio system according to claim 1, characterized in that, The second decorative element is located at the junction of the subwoofer enclosure door panel and the subwoofer enclosure body.

3. The new Chinese-style audio system according to claim 1, characterized in that, The subwoofer enclosure includes two sound tubes and two subwoofers. There is a gap between the sound tubes and the subwoofers. Both the sound tubes and the subwoofers are located at the bottom of the subwoofer enclosure and are embedded in the subwoofer enclosure.

4. The new Chinese-style audio system according to claim 1, characterized in that, The subwoofer enclosure also includes two junction boxes, which are located on the side of the subwoofer enclosure and embedded within it.

5. The new Chinese-style audio system according to claim 1, characterized in that, The upper enclosure also includes two tweeters and four midrange speakers. The tweeters and midrange speakers are all built into a closed housing cavity and are fixedly connected to the inner surface of the enclosure.

6. A multi-band sound field construction method, applied to the new Chinese-style audio system as described in any one of claims 1 to 5, wherein the preamp module of the new Chinese-style audio system is specifically implemented as an audio processing circuit, the audio processing circuit integrating a frequency division processing unit and a signal delay unit, characterized in that, The multi-band sound field construction method includes the following steps: Step S1: Receive the audio input signal through the pre-amplifier module and perform frequency division processing on the audio input signal to separate the audio input signal into low-frequency signal, mid-frequency signal and high-frequency signal; Step S2: Transmit the low-frequency signal to the woofer in the subwoofer enclosure, and transmit the mid-frequency and high-frequency signals to the midrange and tweeters in the upper enclosure. Step S3: Obtain the vertical installation height difference between the subwoofer enclosure and the upper enclosure, and calculate the sound path difference between the subwoofer, midrange speaker, and tweeter when they reach the preset listening position based on the height difference; Step S4: Based on the sound path difference, delay processing is performed on the mid-frequency and high-frequency signals transmitted to the upper enclosure to compensate for the sound output time difference between the woofer, mid-range speaker, and tweeter; Step S5: Control the woofer, midrange speaker and tweeter to emit sound synchronously, and build a multi-band blended sound field that overlaps vertically and is continuous horizontally at the preset listening position of the new Chinese-style audio system.

7. The multi-band sound field construction method according to claim 6, characterized in that, In step S1, the frequency division point setting for frequency division processing includes the following steps: Signals with frequencies below 200Hz are classified as low-frequency signals. Signals with frequencies between 200Hz and 2000Hz are classified as intermediate frequency signals; Signals with frequencies higher than 2000Hz are classified as high-frequency signals; The audio processing circuit is specifically implemented as a digital signal processing chip, which performs active frequency division on the audio input signal.

8. The multi-band sound field construction method according to claim 6, characterized in that, In step S4, while performing delay processing on the intermediate frequency (IF) and high frequency (HF) signals, phase correction is also performed on the IF and HF signals. The phase correction includes the following steps: By adjusting the Q value of the filter in the digital signal processing chip, the phase curves near the crossover point between the mid-frequency band and the low-frequency band can be kept smoothly connected.

9. An acoustic performance tuning method, applied to the new Chinese-style audio system as described in any one of claims 1 to 5, wherein the preamplifier module of the new Chinese-style audio system is specifically implemented as an audio processing circuit, the audio processing circuit integrating a frequency division processing unit and a signal delay unit, characterized in that, The acoustic performance tuning method includes the following steps: Step T1: Establish a communication connection between the debugging terminal and the front-end module; Step T2: Control the new Chinese-style audio system to play preset test signals, including sweep frequency signals and pink noise signals; Step T3: The actual response signal of the new Chinese-style audio system at the preset listening position is collected by the sound pickup device; Step T4: Analyze the actual response signal and calculate the smoothness index of the frequency response curve and the low-frequency standing wave ratio; Step T5: Determine whether the frequency response curve meets the preset smoothness threshold. If not, generate a parameter adjustment command and send it to the front-end module. Step T6: The front-end module automatically adjusts the gain value and crossover point parameters of the corresponding frequency band according to the parameter adjustment command, and then repeats step T1 until the frequency response curve meets the preset smoothness threshold.

10. The acoustic performance tuning method according to claim 9, characterized in that, Step T4 also includes the following steps: Identify the reflection characteristics of the acoustic environment in which the new Chinese-style audio system is located; When a frequency response peak caused by reflections from the cabinet surface or indoor furniture is detected in the mid-to-high frequency band, the gain of the corresponding frequency band is automatically reduced to counteract the effect of the reflecting surface on the sound field.

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