Headphone stereo device that can reproduce realistic scene listening effects

Abstract

The application relates to the technical field of audio equipment, and particularly discloses a head-mounted stereo sound equipment capable of restoring real scene listening sound effects, which can maximize the restoration of the direction and depth of a stereo sound source when listening to audio, and makes the sound obtained by the ear more close to the sound effect of on-site listening, and comprises a left-ear playing unit, a right-ear playing unit, a motion sensing unit for monitoring the motion state of a human head and judging the turning of the human head, and an MCU chip for controlling the working of the left-ear playing unit and the right-ear playing unit; the left-ear playing unit comprises a left-channel main loudspeaker and a right-channel auxiliary loudspeaker, the right-ear playing unit comprises a right-channel main loudspeaker and a left-channel auxiliary loudspeaker, and the MCU chip controls the working of the left-channel main loudspeaker, the right-channel auxiliary loudspeaker, the right-channel main loudspeaker and the left-channel auxiliary loudspeaker to generate a stereo sound effect; and the MCU chip adjusts the volume ratio of the left-ear playing unit to the right-ear playing unit in real time according to the turning signal of the human head sent by the motion sensing unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of audio equipment, in particular to a head-mounted stereo device capable of restoring real scene listening sound effects. BACKGROUND

[0002] Many head-mounted audio devices on the market, such as wired earphones, TWS earphones, neck-mounted earphones, head-mounted wired or wireless earphones, virtual multi-channel earphones, smart audio glasses, AR or VR smart devices, bone conduction earphones, etc., cannot achieve a stereo sound field in front of the head (similar to the sound effect of a Hi-Fi stereo sound box). The technical difficulty lies in that if a Hi-Fi stereo sound box product wants to achieve stereo sound in front of the head, it needs to form an isosceles triangle with the left and right sound boxes and the head, so as to achieve the effect of a stereo sound field. The technical principle is that the acoustic pinna effect and head turning effect formed by the left and right ears and the left and right sound boxes help the Hi-Fi sound box system achieve a stereo effect similar to a real sound field (which can distinguish the front, back, left, and right positions of the sound source). The above-mentioned traditional head-mounted audio (earphone, etc.) system existing in the market does not have the ability to solve the pinna effect and head turning effect, so when wearing a head-mounted audio device, it cannot clearly distinguish the specific position of the sound source in front of the head, back of the head, left of the head, or right of the head, and cannot achieve real stereo sound in front of the head, thereby affecting the user's auditory experience. SUMMARY

[0003] Therefore, it is necessary to provide a head-mounted stereo device capable of restoring real scene listening sound effects in view of the fact that existing head-mounted stereo earphones or TWS cannot obtain real scene sound effects when playing stereo audio. The device can maximize the restoration of the direction and depth of the stereo sound source when listening to audio, so that the sound obtained by the ear is closer to the sound effect of on-site listening.

[0004] A head-mounted stereo device capable of restoring real scene listening sound effects, comprising a left ear playing unit cooperating with the left ear of a human body, a right ear playing unit cooperating with the right ear of a human body, a motion sensing unit for monitoring the motion state of the head of a human body and judging the turning direction of the head of a human body, and an MCU chip for controlling the operation of the left ear playing unit and the right ear playing unit.

[0005] The left ear playing unit comprises a left channel main loudspeaker and a right channel auxiliary loudspeaker, the right ear playing unit comprises a right channel main loudspeaker and a left channel auxiliary loudspeaker, and the MCU chip controls the operation of the left channel main loudspeaker, the right channel auxiliary loudspeaker, the right channel main loudspeaker, and the left channel auxiliary loudspeaker to generate a stereo sound effect.

[0006] When the human wears the head-mounted stereo device, the MCU chip adjusts the volume ratio of the left ear playing unit and the right ear playing unit according to the human head turning signal sent from the motion sensing unit in real time.

[0007] In one of the embodiments, when the MCU chip receives the head right turning information sent from the motion sensing unit, the MCU chip controls the volume ratio of the left ear playing unit to the right ear playing unit to increase; when the MCU chip receives the head left turning information sent from the motion sensing unit, the MCU chip controls the volume ratio of the left ear playing unit to the right ear playing unit to decrease, or the MCU chip controls the volume ratio of the right ear playing unit to the left ear playing unit to increase.

[0008] In one of the embodiments, the head-mounted stereo device further comprises an audio amplifier electrically connected with the MCU chip, and the audio amplifier is used to adjust the volume of the left ear playing unit and the right ear playing unit.

[0009] In one of the embodiments, the motion sensing unit is one of a gyroscope, a gravity sensor, an optical sensor, or a distance sensor.

[0010] In one of the embodiments, the left ear playing unit further comprises at least one first low-frequency speaker, and the right ear playing unit further comprises at least one second low-frequency speaker.

[0011] In one of the embodiments, the left channel main speaker and the right channel auxiliary speaker are arranged on the same side of the first wearing part and adjacent to the front of the left ear, and the first low-frequency speaker is arranged on the other side of the first wearing part and adjacent to the back of the left ear; the right channel main speaker and the left channel auxiliary speaker are arranged on the same side of the second wearing part and adjacent to the front of the right ear, and the second low-frequency speaker is arranged on the other side of the second wearing part and adjacent to the back of the right ear.

[0012] In one of the embodiments, the left channel main speaker and the right channel auxiliary speaker are arranged side by side, or are sequentially arranged along the head height direction, or the included angle between the line connecting the two and the head height direction is obtuse or acute; the right channel main speaker and the left channel auxiliary speaker are arranged side by side, or are sequentially arranged along the head height direction, or the included angle between the line connecting the two and the head height direction is obtuse or acute.

[0013] In one of the embodiments, the head-mounted stereo device further comprises a delay circuit connected with the MCU chip.

[0014] In one of the embodiments, the sizes of the first woofer, the left channel main speaker and the right channel auxiliary speaker in the left ear playing unit are sequentially reduced; the sizes of the second woofer, the right channel main speaker and the left channel auxiliary speaker in the right ear playing unit are sequentially reduced.

[0015] In one of the embodiments, each speaker is one of a moving coil speaker, a moving iron speaker, a piezoelectric speaker, a MEMS speaker, a bone conduction speaker, or a speaker combined by the above various speakers.

[0016] The head-mounted stereo device capable of restoring real scene listening sound effect of the present application is provided with a left channel main speaker and a right channel auxiliary speaker near the left ear, and a right channel main speaker and a left channel auxiliary speaker near the right ear. When the left ear listens to audio, the right channel auxiliary speaker at the left ear is used to simulate audio sound coming from the right side with slight delay, i.e. to compensate for the sound delivered to the left ear by the right channel main speaker. Similarly, when the right ear listens to audio, the left channel auxiliary speaker at the right ear compensates for the sound delivered to the right ear by the left channel main speaker, thereby making up for the pinna effect. By providing a motion sensing unit, the human head turning information can be monitored and fed back, and the volume of each speaker can be adjusted and corrected according to the human head turning information, so as to truly reflect the direction and depth of the sound source, weaken the interference caused by turning the head to the simulated sound source in front of the user's head, improve the natural sound listening performance of the new sound field formed after turning the head, weaken the interference caused by turning the head to the simulated sound source in front of the user's head, solve the problem of real stereo experience that the human body cannot perceive whether the sound occurs in front of the eyes or behind the eyes due to the turning head effect, and improve the user's auditory experience. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic diagram of the head-mounted stereo device in one embodiment of the present application;

[0018] Figure 2 FIG. 2 is a module structural schematic diagram of the head-mounted stereo device in the embodiment shown in FIG. 1; Figure 1

[0019] Figure 3 FIG. 3 is a partially exploded structural schematic diagram of the head-mounted stereo device in one embodiment of the present application;

[0020] Figure 4 FIG. 4 is a position distribution schematic diagram of the speakers in the left ear side in one embodiment of the present application;

[0021] Figure 5 FIG. 5 is a position distribution schematic diagram of the main speaker and the auxiliary speaker arranged side by side in one embodiment of the present application;

[0022] Figure 6 ​Fig. 1 is a schematic diagram of the position distribution of the main speaker and the sub speaker in a vertical arrangement according to an embodiment of the present application;

[0023] Figure 7 Fig. 2 is a schematic diagram of the position distribution of the main speaker and the sub speaker in an inclined arrangement according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without some or all of these specific details. In other instances, well-known structures have not been described in detail in order not to unnecessarily obscure the present application.

[0025] The head-turning effect refers to that when the ear is listening, the sound is in the front, and under the premise that the head does not move, there is a 30% probability that the brain will make a judgment that the sound is in the back. By turning the head to the right, the sound will first reach the left ear and then the right ear, and it will be judged that the sound is in the front. If the sound first reaches the right ear and then the left ear, it will be judged that the sound is in the back. The pinna effect refers to that when the ear is listening, the sound emitted by the right sound box will first reach the right ear, and then the sound emitted by the right sound box will reach the left ear. There is a slight time difference between the direct sound and the environmental reflected sound of the right sound box sound reaching the right ear and the left ear of the user, and people judge that the sound comes from the right (sound box) through this. The sound emitted by the left sound box is the same. However, the existing earphone or earphone system cannot realize the sound positioning of the real sound field reproduced by the pinna effect, which is one of the bases of the stereo sound principle.

[0026] The present invention addresses the problem that conventional head-mounted audio devices, which employ sound-generating devices on either side of the ear to achieve a two-dimensional audio playback effect, often produce sound sources directly overhead, making it difficult for the listener to clearly discern the direction and depth of the sound source. This makes it difficult to address the pinna effect and the head-turning effect. Instead, a motion sensor unit is added to the conventional head-mounted audio device to collect head rotation data. A main speaker, primarily responsible for audio playback, and a secondary speaker, designed to mitigate the pinna effect, are provided on either side of the head-mounted audio device. The resulting control unit of the head-mounted stereo sound device can control and adjust parameters such as the volume and frequency of the main and secondary speakers on either side of the head-mounted audio device based on the head rotation data. This achieves a true stereo sound effect (clearly distinguishing sound sources from the front, back, left, and right of the head) in front of the head when the head-mounted stereo sound device is worn. This allows users to enjoy an immersive concert or real-world sound experience anytime, anywhere, regardless of their surroundings. Specifically, by adjusting the volume ratio of the main speaker and the secondary speaker, the channel balance of the device can be improved, thereby eliminating the time difference between the sound signal from the playback element on one side heard by the user's ear and the sound signal from the playback element on the other side, thereby simulating a stereo effect around the user's head, and overcoming the influence of turning the head on the stereo effect, so as to enhance the sound surround effect of the device.

[0027] Please combine Figure 1 、 Figure 2 as well as Figure 3The head-mounted stereo device 10 of the present application comprises a first wearing part 110 matched with the left ear of a human body, a second wearing part 120 matched with the right ear of the human body, a left-ear playing unit 200 accommodated in the first wearing part 110, a right-ear playing unit 300 accommodated in the second wearing part 120, a motion sensing unit 400 for monitoring the motion state of the head of the human body and judging the turning of the head of the human body, and an MCU chip 500 for controlling the operation of the left-ear playing unit 200 and the right-ear playing unit 300; the left-ear playing unit 200 comprises a left-channel main loudspeaker 210 and a right-channel auxiliary loudspeaker 220, the right-ear playing unit 300 comprises a right-channel main loudspeaker 310 and a left-channel auxiliary loudspeaker 320, and the MCU chip 500 controls the operation of the left-channel main loudspeaker 210, the right-channel auxiliary loudspeaker 220, the right-channel main loudspeaker 310 and the left-channel auxiliary loudspeaker 320 to generate a stereo sound effect. When the human body wears the head-mounted stereo device 10, the MCU chip 500 adjusts the volume ratio of the left-ear playing unit 200 relative to the right-ear playing unit 300 in real time according to the turning signal of the head of the human body sent by the motion sensing unit 400. In the embodiment, the real-time playing volume of the left-channel main loudspeaker 210 and the right-channel auxiliary loudspeaker 220 in the left-ear playing unit 200 is the same, and the real-time playing volume of the right-channel main loudspeaker 310 and the left-channel auxiliary loudspeaker 320 is the same. The volume ratio of the left-ear playing unit 200 relative to the right-ear playing unit 300 is the ratio of the volume of the left-channel main loudspeaker 210 to the volume of the right-channel main loudspeaker 310.

[0028] The first wearing part 110 and the second wearing part 120 are respectively used for mounting the left-ear playing unit 200 and the right-ear playing unit 300 and providing the matching part of the head-mounted stereo device 10 with the head and the ear of the human body. In the embodiment, the head-mounted stereo device 10 further comprises a U-shaped wiring part 130 connected with the first wearing part 110 and the second wearing part 120 respectively, which is hung on the neck of the human body to avoid the head-mounted stereo device 10 from falling off the head of the human body. The MCU chip 500 and the motion sensor can be mounted in the first wearing part 110 or the second wearing part 120, or can be mounted in the U-shaped wiring part 130. Of course, a mounting shell can be arranged at the connection position of the U-shaped wiring part 130 with the first wearing part 110 or the second wearing part 120, the MCU chip 500 is accommodated in the mounting shell, and a through hole for threading a wire or a data line is arranged in the U-shaped wiring part 130 to realize the control of the MCU chip 500 on each loudspeaker in the left-ear playing unit 200 and each loudspeaker in the right-ear playing unit 300.

[0029] In this embodiment, the motion sensing unit 400 is one of a gyroscope, a gravity sensor, an optical sensor or a distance sensor, and the head turning information of the human body includes a head turning angle and a head turning speed. Preferably, the motion sensing unit 400 is a gyroscope. After the human body wears the head-mounted stereo sound device 10, if the head turns, the gyroscope detects the angular motion of the head and sends the angle information of the head deflection to the MCU chip 500, so that the MCU chip 500 adjusts the volume of each speaker in the left ear playing unit 200 and the right ear playing unit 300 according to the deflection angle. When the motion sensing unit 400 is a gravity sensor, an optical sensor or a distance sensor, the MCU chip 500 receives the position change signal sent by the above-mentioned sensor or sensor, and calculates the turning angle of the head of the human body according to the position change signal, and then adjusts the volume of each speaker.

[0030] When the human body wears the head-mounted stereo sound device 10, the MCU chip 500 receives and calculates the head turning information of the human body sent by the motion sensing unit 400 in real time, and generates an audio correction signal for adjusting the volume ratio of the left ear playing unit 200 to the right ear playing unit 300 according to the head turning information of the human body sent by the sensing unit. The main speaker and the auxiliary speaker in the left ear playing unit 200 and the right ear playing unit 300 receive the audio playing instruction and play the audio, while adjusting the volume according to the audio correction signal.

[0031] When the head-mounted stereo sound device 10 is worn and works, when the MCU chip 500 receives the head right turning information sent by the motion sensing unit 400, the MCU chip 500 controls the volume ratio of the left ear playing unit 200 to the right ear playing unit 300 to increase, that is, the volume of the left channel main speaker 210 and the right channel auxiliary speaker 220 is increased, while the volume of the right channel main speaker 310 and the left channel auxiliary speaker 320 is decreased; when the MCU chip 500 receives the head left turning information sent by the motion sensing unit 400, the MCU chip 500 controls the volume ratio of the left ear playing unit 200 to the right ear playing unit 300 to decrease, or the MCU chip 500 controls the volume ratio of the right ear playing unit 300 to the left ear playing unit 200 to increase, that is, the volume of the left channel main speaker 210 and the right channel auxiliary speaker 220 is decreased, while the volume of the right channel main speaker 310 and the left channel auxiliary speaker 320 is increased, so as to compensate for the influence of the head turning effect on the stereo sound in front of the ear.

[0032] Further, the head-mounted stereo device 10 further comprises an audio amplifier electrically connected with the MCU chip 500, the audio amplifier is used for adjusting the volume of each speaker. After receiving the human head turning information sent by the motion sensing unit 400, the MCU chip 500 judges the human head turning direction, turning speed and turning angle and other data according to the human head turning information, and then the MCU chip 500 sends the above data to the audio amplifier, and the audio amplifier generates an audio correction signal of the volume ratio of the left ear playing unit 200 to the right ear playing unit 300 after processing the above data, so as to control the volume of each speaker.

[0033] Further, the MCU chip 500 is loaded with a sound database, and a plurality of auxiliary sound fields are pre-stored in the sound database. The MCU chip 500 receives the human head turning information sent by the motion sensor and calls the preset auxiliary sound field to adjust the left ear playing unit 200 or the right ear playing unit 300. Specifically, the 360-degree turning angle range of the human head is equally divided into 12 turning angle zones. Similarly, 12 auxiliary sound fields are pre-stored in the sound database, each of which is used to adjust the sound channel balance in a turning angle zone. Each auxiliary sound field includes a turning angle range and a volume adjustment signal data, and each auxiliary sound field is sequentially numbered in the order of the turning angle range from small to large. In this way, during the deflection of the human head, the MCU chip 500 does not need to calculate the turning angle signal to obtain the audio adjustment data, but can directly call the corresponding auxiliary sound field data from the sound database, thereby improving the response rate of the audio device. In specific practice, the turning angle zone can be further subdivided, i.e. 36, 48, 52 or more turning angle zones can be set to improve the sensitivity of volume adjustment and enhance the stereo surround effect.

[0034] In an embodiment, the head-mounted stereo device 10 further comprises a wireless receiving unit for wirelessly receiving encoded audio signals and a signal decoding unit for decoding the signals received by the wireless receiving unit to provide audio signals to each speaker, so that the head-mounted stereo device 10 can remotely receive and play audio signals and ensure the reliability of audio signal transmission.

[0035] The following illustrates the principle of realizing the stereo effect by controlling the operation of the main speaker and the auxiliary speaker through the MCU chip 500 by taking the audio content heard at the left ear as an example. The audio content heard at the right ear can be similarly deduced. Specifically, the left-channel main speaker 210 in the first wearable part 110 cooperating with the left ear is used to provide the audio sound source signal so that the left ear can clearly hear the left-channel content. Since the sound signal generated by the right-channel main speaker 310 on the right ear side reaches the left ear at a time slightly different from the time when the left-channel main speaker 210 reaches the left ear, the user's left ear will hear the sound signal transmitted by the right-channel main speaker 310 after a period of time after hearing the sound signal emitted by the left-channel main speaker 210. Thus, interference will occur between the two sound signals transmitted in succession, thereby affecting the effect of the audio content heard at the left ear. By arranging the right-channel auxiliary speaker 220 on the left ear side, the user's left ear will simultaneously hear the sound signals transmitted by the left-channel main speaker 210 and the right-channel auxiliary speaker 220, thereby weakening the influence of the time difference in sound signal transmission.

[0036] In addition, since the right-channel auxiliary speaker 220 and the right-channel main speaker 310 will produce a superposition effect on the left ear side, the right-channel sound signal is strengthened. In order to avoid the volume of the right-channel sound signal heard at the left ear side being higher than that of the left-channel sound signal, thereby causing the problem of obvious high and low pitch at the left ear side, the MCU chip 500 will control the volume of the right-channel auxiliary speaker 220 to be lower than that of the left-channel main speaker 210. Similarly, the MCU chip 500 will also adjust the volume of the left-channel auxiliary speaker 320 so that the volume of the left-channel auxiliary speaker 320 is lower than that of the right-channel main speaker 310, thereby ensuring the balance of the left and right channels of the sound heard by the user's single ear, so as to improve the stereo effect.

[0037] In order to further improve the stereo effect of the device, a woofer is arranged in each of the two playing units to cooperate with the sound signal generated by the main loudspeaker and to strengthen the sound surround effect. Specifically, the left ear playing unit 200 further comprises at least one first woofer 230, and the right ear playing unit 300 further comprises at least one second woofer 330, wherein the first woofer 230 is a left channel woofer, and the second woofer 330 is a right channel woofer. In one embodiment, the left channel main loudspeaker 210 and the right channel main loudspeaker 310 are mid-high loudspeakers, the frequency division point (i.e. frequency) of the left channel auxiliary loudspeaker 320 and the right channel auxiliary loudspeaker 220 is higher than 300 Hz, and the frequency division point of the first woofer 230 and the second woofer 330 is lower than 150 Hz. Taking the audio content heard by the left ear as an example, when the user wears the head-mounted stereo device 10 of the embodiment, the left ear can simultaneously hear the mid-high sound signal emitted by the left channel main loudspeaker 210, the left channel woofer signal emitted by the first woofer 230, and the superimposed signal of the right channel auxiliary loudspeaker 220 and the right channel main loudspeaker 310 at the left ear, i.e. three different frequency high-low sound signals can be heard simultaneously, thereby enhancing the stereo effect of the device.

[0038] In the embodiment, each loudspeaker is one of a moving coil loudspeaker, a moving iron loudspeaker, a piezoelectric loudspeaker, a MEMS loudspeaker, a bone conduction loudspeaker, or a loudspeaker combined by the above various loudspeakers. Of course, it can also be other types of loudspeakers. According to the selection, the device shape and size design, each loudspeaker has a circular, square, rectangular or oval structure, or other special-shaped loudspeakers. In the left ear playing unit 200, the size of the first woofer 230, the left channel main loudspeaker 210 and the right channel auxiliary loudspeaker 220 decreases in order; in the right ear playing unit 300, the size of the second woofer 330, the right channel main loudspeaker 310 and the left channel auxiliary loudspeaker 320 decreases in order. For example, when each loudspeaker is a circular loudspeaker, the diameter of the left channel main loudspeaker 210 and the right channel main loudspeaker 310 is greater than or equal to 15 mm, the diameter of the left channel auxiliary loudspeaker 320 and the right channel auxiliary loudspeaker 220 is greater than or equal to 10 mm, and the diameter of the first woofer 230 and the second woofer 330 is greater than 25 mm. In the embodiment, the size of the auxiliary loudspeaker is smaller than the size of the main loudspeaker, which can reduce the space occupied by each loudspeaker in the device and facilitate the structural design of the device while meeting the volume requirements of the main loudspeaker and the auxiliary loudspeaker.

[0039] In an embodiment, the left channel main speaker 210 and the right channel auxiliary speaker 220 are arranged on the same side of the first wearing part 110 and are adjacent to the front of the left ear, and the first bass speaker 230 is arranged on the other side of the first wearing part 110 and is adjacent to the back of the left ear; the right channel main speaker 310 and the left channel auxiliary speaker 320 are arranged on the same side of the second wearing part 120 and are adjacent to the front of the right ear, and the second bass speaker 330 is arranged on the other side of the second wearing part 120 and is adjacent to the back of the right ear. Please refer to Figure 4 Here, the position distribution of each speaker at the left ear is exemplified by taking the left ear playing unit 200 containing only one first bass speaker 230, and the position distribution of each speaker at the right ear is exemplified by taking the right ear playing unit 300 containing only one second bass speaker 330. Figure 4 As can be seen, the left channel main speaker 210 and the right channel auxiliary speaker 220 are arranged in front of the left ear auricle, and the playing ends of the two are both directed to the left ear, and the sound signals played by the two will be superimposed to weaken the auricle effect; the first bass speaker 230 is arranged behind the left ear auricle, and the playing end of the first bass speaker 230 is directed to the left ear, and the low-frequency signal generated by the first bass speaker 230 will be mixed with the medium-high frequency signal generated by the left channel main speaker 210 and the right channel auxiliary speaker 220 to generate a stereo sound effect.

[0040] In addition, it needs to be further explained that, according to the demand of stereo sound quality, the head-mounted stereo equipment 10 of the present application can further increase the number of main speakers and auxiliary speakers in the left ear playing unit 200 and the right ear playing unit 300 to improve the sound quality effect and the stereo sound effect. The position arrangement mode of the main speaker and the auxiliary speaker includes multiple cases, specifically, the left channel main speaker 210 and the right channel auxiliary speaker 220 are arranged side by side, or are sequentially arranged along the head height direction, or the included angle between the line connecting the two and the head height direction is obtuse or acute; the right channel main speaker 310 and the left channel auxiliary speaker 320 are arranged side by side, or are sequentially arranged along the head height direction, or the included angle between the line connecting the two and the head height direction is obtuse or acute.

[0041] Please refer to Figure 5 As can be seen, when the left channel main speaker 210 and the right channel auxiliary speaker 220 are arranged side by side, they can be arranged at any height between the left ear lobe and the top of the auricle, and the horizontal distance between the left channel main speaker 210 and the left ear can be close, or the horizontal distance between the right channel auxiliary speaker 220 and the left ear can be close. Please refer to Figure 6 , Figure 6 The setting positions of each speaker at the left ear are shown, and as can be seen, the left channel main speaker 210 can be arranged above the right channel auxiliary speaker 220, or below the right channel auxiliary speaker 220; similarly, the right channel main speaker 310 can be arranged above the left channel auxiliary speaker 320, or below the left channel auxiliary speaker 320. Please refer to Figure 7The included angle between the connection of the main speaker and the auxiliary speaker in the same playing unit and the head height direction is obtuse or acute, which can also be understood as the horizontal height of the left channel main speaker 210 and the right channel auxiliary speaker 220 is different, and the horizontal distance from the left ear is different; the horizontal height of the right channel main speaker 310 and the left channel auxiliary speaker 320 is different, and the horizontal distance from the right ear is different, in other words, the main speaker and the auxiliary speaker are inclinedly arranged.

[0042] In combination Figures 5-7 It can be seen that the first bass speaker 230 can be arranged at any height between the ear lobe and the top of the auricle of the left ear, and the second bass speaker 330 can be arranged at any height between the ear lobe and the top of the auricle of the right ear. The material selection, shape and arrangement of the speakers in the left ear playing unit 200 can be the same as or different from those of the speakers in the right ear playing unit 300, and details are not repeated here.

[0043] In the embodiment, the head-mounted stereo device 10 further comprises a delay circuit connected with the MCU chip 500, which is used to limit the time interval of the playing of the left channel main speaker 210 and the right channel auxiliary speaker 220 and the time interval of the playing of the right channel main speaker 310 and the left channel auxiliary speaker 320. Specifically, when the head-mounted stereo device 10 is working, after the MCU chip 500 receives the left ear multi-channel encoded audio signal sent by the outside, the multi-channel encoded audio signal is decoded to obtain the left channel main speaker audio signal and the right channel auxiliary speaker audio signal, and the delay circuit processes the right channel auxiliary speaker audio signal, so that the sound of the right channel auxiliary speaker 220 lags behind the left channel main speaker 210, and the control of the MCU chip 500 on the right ear playing unit 300 is the same. In this way, the sound signal transmitted from the sound source on the other side is simulated by the delayed auxiliary speaker to compensate for the auricle effect.

[0044] The head-mounted stereo device 10 of the present application is arranged with the left channel main speaker 210 and the right channel auxiliary speaker 220 at the first wearing part 110 matched with the left ear, and arranged with the right channel main speaker 310 and the left channel auxiliary speaker 320 at the second wearing part 120 matched with the right ear. When the left ear listens to the audio, the right channel auxiliary speaker 220 at the left ear compensates for the sound transmitted to the left ear by the right channel main speaker 310, and similarly, when the right ear listens to the audio, the left channel auxiliary speaker 320 at the right ear compensates for the sound transmitted to the right ear by the left channel main speaker 210, thereby compensating for the auricle effect; through the arrangement of the motion sensing unit 400, the human head turning information can be monitored and fed back, and the working parameters of the speakers can be adjusted and corrected through the human head turning information, to weaken the interference caused by turning the head to the simulated sound source in front of the user's head, so as to ensure the stereo effect of the audio device and improve the user's auditory experience.

[0045] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as there is no conflict, any combination of the technical features should be considered within the scope of the present disclosure.

[0046] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A head-mounted stereo device that can reproduce a realistic scene listening sound effect, characterized by, The left ear playing unit cooperates with the left ear of the human body, the right ear playing unit cooperates with the right ear of the human body, the motion sensing unit is used for monitoring the motion state of the head of the human body and judging the turning of the head of the human body, and the MCU chip is used for controlling the working of the left ear playing unit and the right ear playing unit. The left ear playing unit comprises a left channel main loudspeaker and a right channel auxiliary loudspeaker, the right ear playing unit comprises a right channel main loudspeaker and a left channel auxiliary loudspeaker, and the MCU chip controls the working of the left channel main loudspeaker, the right channel auxiliary loudspeaker, the right channel main loudspeaker and the left channel auxiliary loudspeaker to generate a stereo sound effect. When the human body wears the head-mounted stereo sound device, the MCU chip adjusts the volume ratio of the left ear playing unit to the right ear playing unit in real time according to the turning signal of the head of the human body sent by the motion sensing unit; the volume of the right channel auxiliary loudspeaker is lower than that of the left channel main loudspeaker, and the volume of the left channel auxiliary loudspeaker is lower than that of the right channel main loudspeaker. The MCU chip is loaded with a sound database, the sound database pre-stores a plurality of auxiliary sound fields, each auxiliary sound field is used for adjusting the balance of a sound channel in a turning angle range, each auxiliary sound field comprises a turning angle range and a volume adjustment signal data, and each auxiliary sound field is sequentially numbered in the order of the turning angle range from small to large; in the process of deflection of the head of the human body, the MCU chip does not need to calculate the turning angle signal to obtain audio adjustment data, but can directly retrieve corresponding auxiliary sound field data from the sound database, thereby improving the response rate of the audio device. When the MCU chip receives the right turning information of the head sent by the motion sensing unit, the MCU chip controls the volume ratio of the left ear playing unit to the right ear playing unit to increase; when the MCU chip receives the left turning information of the head sent by the motion sensing unit, the MCU chip controls the volume ratio of the left ear playing unit to the right ear playing unit to decrease, or the MCU chip controls the volume ratio of the right ear playing unit to the left ear playing unit to increase.

2. The head-mounted stereo device of claim 1, wherein, The audio amplifier is electrically connected with the MCU chip and is used for adjusting the volume of the left ear playing unit and the right ear playing unit.

3. The head-mounted stereo device of claim 2, wherein, The motion sensing unit is one of a gyroscope, a gravity sensor, an optical sensor and a distance sensor.

4. The head-mounted stereo device of claim 3, wherein, The left ear playing unit further comprises at least one first bass loudspeaker, and the right ear playing unit further comprises at least one second bass loudspeaker.

5. The head-mounted stereo device of claim 4, wherein, The head-mounted stereo sound device further comprises a first wearing part cooperating with the left ear of the human body and a second wearing part cooperating with the right ear of the human body, the left channel main loudspeaker and the right channel auxiliary loudspeaker are arranged on the same side of the first wearing part and are adjacent to the front of the left ear, and the first bass loudspeaker is arranged on the other side of the first wearing part and is adjacent to the back of the left ear; the right channel main loudspeaker and the left channel auxiliary loudspeaker are arranged on the same side of the second wearing part and are adjacent to the front of the right ear, and the second bass loudspeaker is arranged on the other side of the second wearing part and is adjacent to the back of the right ear.

6. The head-mounted stereo device of claim 5, wherein, The left channel main loudspeaker and the right channel auxiliary loudspeaker are arranged side by side, or are sequentially arranged along the head height direction, or the included angle between the line connecting the two and the head height direction is obtuse or acute.

7. The head-mounted stereo device of claim 6, wherein, The delay circuit is connected with the MCU chip.

8. The head-mounted stereo device of claim 7, wherein, In the left ear playing unit, the sizes of the first bass loudspeaker, the left channel main loudspeaker and the right channel auxiliary loudspeaker sequentially decrease; in the right ear playing unit, the sizes of the second bass loudspeaker, the right channel main loudspeaker and the left channel auxiliary loudspeaker sequentially decrease.

9. The head-mounted stereo device of claim 8, wherein, Each loudspeaker is one of a moving coil loudspeaker, a moving iron loudspeaker, a piezoelectric loudspeaker, a MEMS loudspeaker, a bone conduction loudspeaker, or a loudspeaker combined by the above various loudspeakers.

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