Ear-hanging personal audio device

Abstract

The present invention discloses an ear-hanging personal audio device, the key points of the technical solution are that it includes a housing, a speaker and a front conduit, one side of the speaker is connected to the front conduit and sealed with each other, the speaker is provided with a radiation port, the sound waves radiated by the speaker are transmitted to a distance less than 10mm from the ear canal opening through the front conduit. The other side of the speaker is sealed and connected with a rear conduit, the sound waves radiated by the other side of the speaker are transmitted to the back of the ear through the rear conduit, and the shortest propagation distance of the sound waves from the tube mouth of the rear conduit to the ear canal opening is not less than 40mm. The present invention opens the ear canal, making it convenient for users to hear surrounding sounds. The bass is rich, and adding a conduit to the speaker will not increase the resonant frequency of the speaker like adding a box to the speaker, but will reduce the resonant frequency and improve the low-frequency effect of the speaker.

Description

[Technical field]

[0001] The invention relates to an ear-hanging type personal audio device. [Background technology]

[0002] Headphones have good sound quality, portability and sound privacy, and are being accepted by more and more people as personal portable music playback devices, which are convenient for listening to music and communicating while traveling. And because of the good sound privacy, whether listening to music or communicating, it will not disturb others, nor will it leak the content of the other party's call and cause privacy to be eavesdropped. However, headphones block the ear canal, making it difficult for the listener to hear the sound next to him, which has some inconveniences and dangers:

[0003] 1. Communication is inconvenient. Since the ear canal is blocked, communication is inconvenient and the earphones need to be taken off.

[0004] 2. Potential danger: when the ear canal is blocked, it is inconvenient to hear some external danger signals, especially when exercising, which poses a potential threat.

[0005] Bone conduction headphones can overcome the above difficulties, but the sound quality is difficult to meet the requirements of most people for listening to music. In addition, bone conduction headphones must have a certain clamping force, which compresses people's skin and causes some discomfort when worn for a long time.

[0006] The present invention is made based on this situation. [Summary of the invention]

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a personal music playback device which can be hung on the ear and has excellent sound quality, is lightweight and has an open ear canal.

[0008] The present invention is achieved through the following technical solutions:

[0009] An ear-hook personal audio device, characterized in that it includes a housing 10, a speaker 20 and a front duct 32, wherein one side of the speaker 20 is connected to the front duct 32 and sealed with each other, and a radiation port 50 is provided on the speaker 20. The sound waves radiated by the speaker 20 are transmitted through the front duct 32 to a distance d from the ear canal opening, d<=10mm; the other side of the speaker 20 directly radiates the sound waves to the ear canal opening into the air or transmits them to the ear canal opening through the rear duct 31, and the shortest propagation distance is a, a / d>8.

[0010] The ear-hook personal audio device as described above is characterized in that: the mouth of the front conduit 32 is provided with an inwardly curved inclined opening, and the angle θ of the opening satisfies the condition -60°<θ<60°.

[0011] The ear-hook personal audio device as described above is characterized in that: the rear duct 31 is sealedly connected to the other side of the speaker 20, the sound waves radiated from the other side of the speaker 20 are transmitted to the back of the ear through the rear duct 31, and the shortest propagation distance for the sound waves at the mouth of the rear duct 31 to propagate to the opening of the ear canal is a, a=>40mm.

[0012] The ear-hook personal audio device as described above is characterized in that: the speaker 20 is arranged in front of the ear, the cross-sectional area error of the front duct 32 and the rear duct 31 does not exceed ±20%, and the length error does not exceed ±20%.

[0013] The ear-hook type personal audio device as described above is characterized in that the cross-sectional area of ​​the front conduit 32 is not greater than 1 / 2 of the effective radiation area of ​​the speaker 20 .

[0014] The ear-hook personal audio device as described above is characterized in that: the speaker 20 is arranged behind the ear, the front conduit 32 bypasses the ear to transmit the sound waves to the range of 10 mm near the ear canal opening, and the lengths of the rear conduit 31 and the front conduit 32 are inconsistent.

[0015] The ear-hook personal audio device as described above is characterized in that: the speaker 20 is arranged in front of the ear near the ear canal, the rear conduit 31 bypasses the ear to transmit the sound waves to the back of the ear, and the lengths of the rear conduit 31 and the front conduit 32 are inconsistent.

[0016] The ear-hook personal audio device as described above is characterized in that: when the sound waves radiated directly into the air by the speaker 20 propagate to the ear canal opening, the speaker 20 is arranged behind the ear and the shortest propagation distance a is not less than 40 mm; the difference in the frequency response curves of the sound waves radiated directly into the air by the speaker 20 and the sound waves radiated from the front conduit 32 opening after 1 / 3 octave smoothing does not exceed 6 dB.

[0017] The ear-hook personal audio device as described above is characterized in that: a rear speaker 21 is provided at the end of the rear duct 31, the rear speaker 21 is connected to the rear duct 31 and sealed with each other, the speaker 20 and the rear speaker 21 drive the air in the rear duct 31 to move in the same direction; the difference in the frequency response curves of the front and rear sound waves radiated into the air by the rear speaker 21 and the sound waves radiated from the front duct 32 after 1 / 3 octave smoothing does not exceed 6dB.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The present invention opens the ear canal, making it convenient for users to hear surrounding sounds.

[0020] 2. The present invention has excellent sound quality and does not require clamping force. Since the present invention transmits sound through air, no specific clamping force is required.

[0021] 3. The present invention has good privacy, does not affect the surrounding environment, and does not disclose the content being listened to.

[0022] 4. The present invention is light and portable, and the speaker of the present invention can be hung on the ear, which is convenient for traveling.

[0023] 5. The present invention has rich bass. Adding a duct to the speaker will not increase the resonance frequency of the speaker like adding a box to the speaker, but will reduce the resonance frequency and improve the low-frequency effect of the speaker.

Brief Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0025] Figure 2 yes Figure 1 Cross-section view along the AA direction;

[0026] Figure 3 is an AA cross-sectional view of the speaker in the first embodiment of the present invention when it is placed in reverse;

[0027] Figure 4 is a schematic diagram of the bending of the catheter port of the present invention;

[0028] Figure 5 is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0029] Figure 6 is a structural diagram of Embodiment 4 of the present invention;

[0030] Figure 7 is a structural diagram of Embodiment 5 of the present invention;

[0031] Figure 8 is a structural diagram of Embodiment 6 of the present invention;

[0032] In the figure: 10 is a housing; 20 is a speaker; 21 is a rear speaker; 31 is a rear duct; 32 is a front duct; 50 is a radiation port. [Specific implementation method]

[0033] The technical features of the present invention are further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand them.

[0034] This patent seeks to protect an ear-hook type personal audio device, and in particular the mechanical structure of the device.

[0035] The device includes a housing 10, a speaker 20 and a front conduit 32. One side of the speaker 20 is connected to the front conduit 32 and sealed with each other. The speaker 20 is provided with a radiation port 50. The sound waves radiated by the speaker 20 are transmitted through the front conduit 32 to a distance d from the ear canal opening, d<=10mm.

[0036] The ear-hook personal audio device opens the ear canal, making it easier for users to hear surrounding sounds. The sound is transmitted through the air, no specific clamping force is required, and the device can be hung on the ear for travel convenience.

[0037] like Figure 4 As shown, in order to allow the sound waves to be transmitted to the human ear in a more concentrated manner, an inwardly curved inclined opening can be made at the mouth of the front conduit 32, and the opening angle θ satisfies the condition -60°<θ<60°.

[0038] The embodiment of the device structure is as follows Figure 1 and Figure 2 As shown, it includes a housing 10, a speaker 20, a front conduit 32 and a rear conduit 31. Since the sound waves radiated from the front and back of the speaker 20 have the same amplitude and opposite phases, the sound waves from the front and back cancel each other out without any obstruction, so that the user cannot hear the bass. This is the phenomenon of acoustic short circuit. In order to prevent this from happening, it is necessary to design an acoustic propagation path to reduce or prevent acoustic short circuit. The front of the speaker 20 is connected to the front conduit 32 and sealed with each other. The sound waves radiated from the front of the speaker 20 are transmitted to the vicinity of the ear canal opening through the front conduit 32. The distance from the ear canal opening is d, d<=10mm, so Figure 1 The middle front conduit 32 is located at the opening of the ear canal, and the distance d from the opening of the ear canal is approximately equal to 0 mm. Figure 1 d cannot be shown in the figure.

[0039] The shape of the front conduit 32 can be any shape, and the cross-sectional area can be adjusted according to the design requirements, usually not more than 1 / 2 of the effective radiation area of ​​the speaker 20. The back of the speaker 20 is connected to the rear conduit 31 and sealed with each other. The sound waves radiated from the back of the speaker 20 are transmitted to the back of the ear through the rear conduit 31. The distance between the end of the rear conduit 31 and the ear canal opening is a. a is not the straight-line distance from the end of the rear conduit 31 to the ear canal opening. Since the sound waves need to bypass the auricle, it is the minimum value of the actual propagation distance of the sound waves, and the minimum value is not less than 40mm. Since the sound waves attenuate as the propagation distance increases, the distance doubles and the sound wave amplitude attenuates by 1 and a half (6dB). Therefore, increasing the ratio of a / d can make the sound waves radiated from the back of the speaker 20 much lower than the sound waves radiated from the front when they propagate to the ear canal opening, so that the user's ear canal mainly receives the sound waves radiated from the front of the speaker 20. When a / d>8, the back sound waves have almost no effect, thereby achieving the best sound quality.

[0040] For a person at a distant point M, the distance between his ear and the end of the front conduit 32 is b, and the distance between his ear and the end of the rear conduit 31 is c. Since both b and c are much greater than a, it can be considered that b≈c. Therefore, when the sound waves radiated by the two conduits propagate to point M, the amplitudes are almost the same and the phases are opposite, and they cancel each other out. The sound waves heard from a distance are very weak. In order to achieve the best silencing effect, the cross-sectional area error of the rear conduit 31 and the front conduit 32 shall not exceed ±20%, and the length error shall not exceed ±20%.

[0041] Since the sound waves radiated from the front and back of the speaker 20 have the same amplitude and opposite phase, the speaker 20 of this embodiment can be used in reverse. That is, the second embodiment of this patent: the back of the speaker 20 is connected to the front conduit 32, and the front of the speaker 20 is connected to the rear conduit 31. Figure 3 As shown, it can be seen that the front of the loudspeaker 20 is connected to the rear duct 31, and the back of the loudspeaker 20 is connected to the front duct 32. This embodiment is similar to the effect of the loudspeaker 20 being installed forward.

[0042] Embodiment 3 and embodiment 4 of this patent are respectively as follows Figure 5 and Figure 6 As shown, in Figure 5 In the embodiment of the present invention, the speaker 20 is located above and behind the ear. Figure 6 The speaker 20 of the embodiment is located in front of the ear. The lengths of the rear duct 31 and the front duct 32 of the two embodiments are inconsistent, so the radiated sound waves are not equal, and the mutual cancellation effect is weakened. In order to achieve good noise reduction, the signal characteristics of the ends of the rear duct 31 and the front duct 32 can be measured respectively by a spectrum analysis device, and the diameter or length of the rear duct 31 or the front duct 32 can be adjusted according to actual needs, so that the characteristics of the sound waves radiated by the two ducts are similar, and the best noise reduction effect is accurately achieved.

[0043] Because as the diameter of the conduit decreases or the length increases, the loudness will become lower and the high-frequency response will decrease. Therefore, if the response sensitivity of the front conduit 32 is greater than that of the rear conduit, it is necessary to increase the diameter of the rear conduit 31 or shorten the length of the rear conduit 31 until the frequency response characteristics of the two conduit ports are smoothed by 1 / 3 octave and the difference is within 6dB.

[0044] Embodiment 5 of this patent is as follows Figure 7As shown, the fifth embodiment has the same principle as the previous four embodiments. In this embodiment, the speaker 20 is located behind the ear, and the rear duct is cancelled, leaving only the front duct 32. Similarly, the end of the front duct 32 is less than 10 mm from the entrance of the ear canal, and the minimum distance for the sound waves radiated by the speaker 20 to propagate to the ear canal entrance is not less than 40 mm. In this embodiment, since there is no rear duct 31, the sound waves radiated from the back of the speaker 20 will be greater than the sound waves radiated from the end of the front duct 32, so good mutual cancellation cannot be achieved. In order to improve the privacy of the call, the opening area and radiation damping of the radiation port 50 on the back of the speaker 20 can be adjusted as needed to achieve radiation characteristics similar to those at the end of the front duct 32 and enhance the silencing effect.

[0045] There are two debugging methods for this patented device before leaving the factory, one is duct radiation and the other is direct speaker radiation. Both methods require first determining the design of the front ear canal opening, measuring the response characteristics of the front duct 32 opening, and then adjusting the rear duct 31 or the speaker radiation opening to match the front duct 32. The goal is that the difference in the front and rear sound wave frequency response curves after 1 / 3 octave smoothing does not exceed 6dB.

[0046] 1. Catheter debugging: after debugging, if it is found that the sensitivity of the rear duct 31 is higher or the high frequency is more, the cross-sectional area of ​​the rear duct 31 can be reduced or the length of the rear duct 31 can be increased; otherwise, the cross-sectional area of ​​the rear duct 31 can be increased or the length of the rear duct 31 can be reduced.

[0047] 2. Direct radiation of the speaker. If the sound waves radiated by the speaker 20 are more sensitive or have higher frequencies than the front conduit 32, the area of ​​the radiation port 50 can be reduced. Otherwise, the area of ​​the radiation port 50 can be increased. Damping can usually be used to reduce the radiation sensitivity and make the curve smoother. This debugging method is suitable for implementation five.

[0048] Figure 8 is based on Figure 6 A variation of the embodiment. Figure 6 A rear speaker 21 is added on the basis of the embodiment. The rear speaker 21 is located at the end of the rear duct 31 and is sealed and installed with the rear duct 31. The distance that the sound waves radiated by the rear speaker 21 propagate to the ear canal opening is not less than 40 mm. By controlling the polarity of the input signals of the speaker 20 and the rear speaker 21, the two speakers drive the air movement in the rear duct 31 in the same direction. The area and damping of the radiation port 50 of the rear speaker 21 are controlled so that the sound waves emitted by the rear speaker 21 have the same amplitude and opposite phase as the sound waves at the port of the front duct 32, thereby achieving silencing. The second debugging method mentioned above can also be used to debug this embodiment. The advantage of this embodiment is that it can easily prevent water and dust from entering the duct 31, thereby achieving waterproof and dustproof.

[0049] The embodiments described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should all fall within the protection scope of the present invention.

Claims

1. An ear-hanging personal audio device, characterized in that: The invention comprises a housing (10), a speaker (20) and a front conduit (32), wherein one side of the speaker (20) is connected to the front conduit (32) and sealed with each other, and a radiation port (50) is provided on the speaker (20). The sound waves radiated by the speaker (20) are transmitted through the front conduit (32) to a distance d from the ear canal opening, d<=10 mm; the other side of the speaker (20) directly radiates the sound waves to the ear canal opening into the air or transmits them to the ear canal opening through the rear conduit (31), and the shortest propagation distance is a, a / d>8; The front conduit (32) is provided with an inwardly curved inclined opening at its mouth, and an angle θ of the opening satisfies the condition -60°<θ<60°.

2. The ear-hanging personal audio device according to claim 1, characterized in that: The rear conduit (31) is sealedly connected to the other side of the speaker (20), and the sound waves radiated from the other side of the speaker (20) are transmitted to the back of the ear through the rear conduit (31). The shortest propagation distance of the sound waves from the tube opening of the rear conduit (31) to the ear canal opening is a, and a=>40mm.

3. The ear-hanging personal audio device according to claim 2, characterized in that: The loudspeaker (20) is arranged in front of the ear, and the cross-sectional area error of the front conduit (32) and the rear conduit (31) does not exceed ±20%, and the length error does not exceed ±20%.

4. The ear-hanging personal audio device according to claim 2, characterized in that: The cross-sectional area of ​​the front conduit (32) is no greater than 1 / 2 of the effective radiation area of ​​the loudspeaker (20).

5. The ear-hanging personal audio device according to claim 2, characterized in that: The loudspeaker (20) is arranged behind the ear, and the front conduit (32) bypasses the ear to transmit sound waves to a range of 10 mm near the ear canal opening. The lengths of the rear conduit (31) and the front conduit (32) are inconsistent.

6. The ear-hanging personal audio device according to claim 2, characterized in that: The loudspeaker (20) is arranged in front of the ear and close to the ear canal, and the rear conduit (31) bypasses the ear to transmit the sound waves to the back of the ear. The lengths of the rear conduit (31) and the front conduit (32) are inconsistent.

7. The ear-hanging personal audio device according to claim 1, characterized in that: When the sound waves radiated directly into the air by the loudspeaker (20) propagate to the opening of the ear canal, the loudspeaker (20) is arranged behind the ear and the shortest propagation distance a is not less than 40 mm; the difference in the frequency response curves of the sound waves radiated directly into the air by the loudspeaker (20) and the sound waves radiated from the opening of the front conduit (32) after 1 / 3 octave smoothing does not exceed 6 dB.

8. The ear-hanging personal audio device according to claim 6, characterized in that: A rear loudspeaker (21) is provided at the end of the rear duct (31); the rear loudspeaker (21) is connected to the rear duct (31) and sealed with each other; the loudspeaker (20) and the rear loudspeaker (21) drive the air in the rear duct (31) to move in the same direction; and the difference in the frequency response curves of the front and rear sound waves after 1 / 3 octave smoothing between the sound waves radiated into the air by the rear loudspeaker (21) and the sound waves radiated from the mouth of the front duct (32) does not exceed 6 dB.

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