Control device and control method of noise reduction headphones

Abstract

A control device and control method for noise-canceling headphones. The control device is coupled to the noise-canceling headphones. The control device includes a detection component and a microcontroller. The detection component includes a first electrode, a second electrode, and a third electrode. The first electrode is used to detect the potential of a reference point on the face of a user. The second electrode is used to detect the potential of a test point on the face of the user. The third electrode is used to detect the potential of another test point on the face of the user. The detection component uses the potential of the reference point, the potential of the test point, and the potential of another test point to obtain a potential difference generated by the muscles of the user's face. The potential difference is obtained by multiplying the absolute value of the difference between the potential of the test point and the potential of the other test point by a coefficient and then subtracting the potential of the reference point. The microcontroller is electrically connected to the detection component and is used to determine whether to turn off the noise reduction function of the noise-canceling headphones based on the potential difference.

Description

Technical Field

[0001] The present invention relates to a control device and a control method, and in particular to a control device and a control method for a noise reduction headset. Background Art

[0002] Currently, a variety of noise-canceling headphones have been developed on the market to provide users with better sound quality services. Noise-canceling headphones can be divided into passive noise-canceling and active noise-canceling. Passive noise-canceling, for example, uses sound-isolating materials to isolate the ear canal from the external environment to reduce external noise and noise. Active noise-canceling, for example, captures the sound in the external environment and uses sound waves with opposite phases and the same amplitude to cancel out the sound in the external environment to reduce external noise and noise.

[0003] However, whether it is passive noise reduction or active noise reduction, when the user wants to hear external sounds or talk to another person, the noise reduction function of the noise reduction headset must be turned off manually in order to hear the other person's speech clearly. For example, current noise reduction headsets are equipped with a physical switch or force sensor on the headset. When the user wants to hear external sounds or talk to another person, the user must manually switch the physical switch or press the force sensor to turn off the noise reduction function of the noise reduction headset. This will cause inconvenience to the user.

[0004] Therefore, how to improve the above shortcomings and provide a more efficient method to turn off the noise reduction function of the noise reduction headphones has become the direction of the industry's efforts. Summary of the invention

[0005] The invention relates to a control device and a control method for noise reduction headphones, which can determine whether to turn off the noise reduction function of the noise reduction headphones according to the potential difference generated by the facial muscles of the user.

[0006] According to one embodiment of the present invention, a control device for noise-canceling headphones is provided. The control device is coupled to the noise-canceling headphones. The control device includes a detection component and a microcontroller. The detection component includes a first electrode, a second electrode, and a third electrode. The first electrode is used to detect the potential of a reference point on the face of a user. The second electrode is used to detect the potential of a test point on the face of the user. The third electrode is used to detect the potential of another test point on the face of the user. The detection component uses the potential of the reference point, the potential of the test point, and the potential of another test point to obtain a potential difference generated by the muscles of the face of a user. The potential difference is obtained by multiplying the absolute value of the difference between the potential of the test point and the potential of the other test point by a coefficient and then subtracting the potential of the reference point. The microcontroller is electrically connected to the detection component and is used to determine whether to turn off a noise reduction function of the noise-canceling headphones based on the potential difference.

[0007] According to another embodiment of the present invention, a control method for noise-canceling headphones is provided. The control method comprises the following steps. A first electrode is used to detect the potential of a reference point on the face of a user. A second electrode is used to detect the potential of a test point on the face of the user. A third electrode is used to detect the potential of another test point on the face of the user. A potential difference generated by the muscles of the face of a user is obtained by using the potential of the reference point, the potential of the test point and the potential of the other test point. The potential difference is obtained by multiplying the absolute value of the difference between the potential of the test point and the potential of the other test point by a coefficient and then subtracting the potential of the reference point. Based on the potential difference exceeding a threshold, a noise reduction function of the noise-canceling headphones is turned off. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to better understand the above and other aspects of the present invention, embodiments are given below and described in detail with reference to the accompanying drawings:

[0009] Figure 1 A schematic diagram of a noise reduction headset and a control device according to an embodiment of the present invention is shown.

[0010] Figure 2 A flow chart of a method for controlling a noise-cancelling headphone according to an embodiment of the present invention is shown.

[0011] Figure 3 A schematic diagram is shown of a control device disposed on a noise-cancelling headset according to an embodiment of the present invention.

[0012] Figure 4 A schematic diagram is shown of using the first electrode, the second electrode and the third electrode of the detection component to obtain the potential difference generated by the muscles of the user's face according to an embodiment of the present invention.

[0013] Figure 5 FIG. 4 is a schematic diagram of an electromyogram according to an embodiment of the present invention.

[0014] The reference numerals are described as follows:

[0015] 100: Control device

[0016] 101: Rotating shaft element

[0017] 102: Plate body

[0018] 110: Detection Components

[0019] 120: Microcontroller

[0020] 200: Noise-canceling headphones

[0021] 210: Noise reduction module

[0022] 300: Fixing parts

[0023] 301, 302: Screws

[0024] D1: First distance

[0025] D2: Second distance

[0026] D3: The third distance

[0027] MS: Potential difference

[0028] CS: Control signal

[0029] S110, S120: Steps

[0030] E1: First electrode

[0031] E2: Second electrode

[0032] E3: The third electrode DETAILED DESCRIPTION

[0033] The present invention does not show all possible embodiments, and other embodiments not proposed in the present invention may also be applicable. Furthermore, the dimensional ratios in the drawings are not drawn in proportion to the actual product. Therefore, the description and the illustrated contents are only used to describe the embodiments, and are not used to limit the scope of protection of the present invention. In addition, the descriptions in the embodiments, such as detailed structures, process steps and material applications, etc., are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. The steps and structural details of the embodiments can be changed and modified according to the needs of the actual application process without departing from the spirit and scope of the present invention.

[0034] Please refer to Figure 1 , which depicts a schematic diagram of a noise cancelling headset 200 and a control device 100 according to an embodiment of the present invention. The control device 100 is coupled to the noise cancelling headset 200. The control device 100 communicates with the noise cancelling headset 200, for example, wirelessly or by wire. The control device 100 includes a detection component 110 and a microcontroller (MCU) 120. The microcontroller 120 is electrically connected to the detection component 110. The detection component 110 is, for example, an electromyography (EMG) measurement device. The noise cancelling headset 200 includes a noise reduction module 210. The noise reduction module 210 performs a noise reduction function.

[0035] Please also refer to Figure 1 and Figure 2 . Figure 2 A flow chart of a control method of the noise cancelling headphone 200 according to an embodiment of the present invention is shown. The control method of the noise cancelling headphone 200 includes steps S110 and S120.

[0036] Step S110, using a first electrode of the detection component 110 to detect the potential of a reference point on the user's face, using a second electrode of the detection component 110 to detect the potential of a test point on the user's face, using a third electrode of the detection component 110 to detect the potential of another test point on the user's face, the detection component 110 uses the potential of the reference point, the potential of the test point and the potential of the other test point to obtain a potential difference MS generated by the muscles of the user's face. The potential difference MS is obtained by multiplying the absolute value of the difference between the potential of the test point and the potential of the other test point by a coefficient and then subtracting the potential of the reference point. The potential difference MS can be expressed as the following formula 1:

[0037] α×|T1-T2|-R (Formula 1)

[0038] Where α is a coefficient, T1 is the potential of the test point, T2 is the potential of another test point, and R is the potential of the reference point. The coefficient α is a certain value. In one embodiment, the coefficient α can be 1100, but is not limited thereto. The control device 100 can be disposed on the noise reduction headset 200. Please refer to Figure 3 , which is a schematic diagram showing a control device 100 disposed on a noise cancelling headphone 200 according to an embodiment of the present invention. In one embodiment, the control device 100 can be fastened to the noise cancelling headphone 200 by passing screws 301 and 302 through a fixing member 300. Please refer to Figure 4, which depicts a schematic diagram of obtaining the potential difference MS generated by the muscles of the user's face using the first electrode E1, the second electrode E2, and the third electrode E3 of the detection component 110 according to an embodiment of the present invention. The detection component 110 includes the first electrode E1, the second electrode E2, and the third electrode E3, and the first electrode E1, the second electrode E2, and the third electrode E3 are attached to the cheek of the user. The first electrode E1, the second electrode E2, the third electrode E3 and the microcontroller 120 can be set on a flexible circuit board. The first electrode E1 is used to detect the potential of a reference point on the user's face, the second electrode E2 is used to detect the potential of a test point on the user's face, and the third electrode E3 is used to detect the potential of another test point on the user's face. Since the muscles of the face of the user will contract and relax when the user speaks, a weak current will be generated when the muscles contract. Therefore, the potential can be detected by attaching the first electrode E1, the second electrode E2, and the third electrode E3 to the user's face. In one embodiment, in order to make the detected potential more accurate, the first electrode E1 of the reference point can be attached to a position closer to the user's ear than the second electrode E2 and the third electrode E3 of the test point. Alternatively, there is a first distance D1 between the first electrode E1 of the reference point and the second electrode E2 of the test point, a second distance D2 between the first electrode E1 of the reference point and the third electrode E3 of the test point, a third distance D3 between the second electrode E2 of the test point and the third electrode E3, and the first distance D1 and the second distance D2 are greater than the third distance D3. In one embodiment, the control device 100 further includes a rotating shaft element 101 and a plate body 102. The second electrode E2 and the third electrode E3 of the test point are disposed on the plate body 102, and the plate body 102 can be rotated by the rotating shaft element 101, so that the second electrode E2 and the third electrode E3 of the test point can be suitable for users with different face shapes.

[0039] Please refer to Figure 5 , which is a schematic diagram of an electromyogram according to an embodiment of the present invention. When a user speaks, the potential difference generated by the muscles on his face changes as shown in FIG. Figure 5 shown. Figure 5 The change in potential difference shown can be obtained from the above formula 1.

[0040] In step S120, the microcontroller 120 determines whether to turn off the noise reduction function of the noise reduction headset 200 according to the potential difference MS. More specifically, a threshold value may be set in the present case. When the detected potential difference exceeds the threshold value, it indicates that the user is speaking, and the microcontroller 120 transmits a control signal CS to a noise reduction module 210 of the noise reduction headset 200 to automatically turn off the noise reduction function of the noise reduction headset. On the contrary, when the detected potential difference does not exceed the threshold value, it indicates that the user is not speaking, and the microcontroller 120 transmits a control signal CS to the noise reduction module 210 of the noise reduction headset 200 to automatically turn on the noise reduction function of the noise reduction headset. The threshold value may be set between 1.3V and 1.9V to determine whether the user is speaking, but the threshold value of the present invention is not limited to the above range. Preferably, the threshold value may be set to 1.6V. In another embodiment, the microcontroller 120 may also automatically adjust the volume of the noise reduction headset 200 according to the potential difference MS. For example, when the detected potential difference exceeds the threshold, it means that the user is talking, and the microcontroller 120 transmits the control signal CS to the noise cancelling earphone 200 to automatically reduce the volume of the noise cancelling earphone. On the contrary, when the detected potential difference does not exceed the threshold, it means that the user is not talking, and the microcontroller 120 transmits the control signal CS to the noise cancelling earphone 200 to automatically increase the volume of the noise cancelling earphone.

[0041] In this way, the present invention can determine whether to turn off the noise reduction function of the noise reduction headset through the potential difference generated by the muscles of the user's face. Therefore, when the user wants to talk to another person, there is no need to manually turn off the noise reduction function of the noise reduction headset, making the noise reduction headset more convenient to use.

[0042] In summary, although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the following claims.

Claims

1. A control device for a noise-canceling headset, the control device being coupled to the noise-canceling headset, characterized in that: The control device comprises: A detection component, comprising: a first electrode for detecting a potential of a reference point on a user's face; a second electrode for detecting a potential of a test point on the user's face; a third electrode for detecting a potential at another test point on the user's face, wherein the detection component uses the potential at the reference point, the potential at the test point and the potential at the other test point to obtain a potential difference generated by the muscles of the user's face, the potential difference being obtained by multiplying the absolute value of the difference between the potential at the test point and the potential at the other test point by a coefficient and then subtracting the potential at the reference point; and a microcontroller, which is electrically connected to the detection component and can determine whether to turn off a noise reduction function of the noise reduction headset according to the potential difference; The first electrode detects the potential of the reference point on the user's face from a position closer to the user's ear than the second electrode and the third electrode.

2. The control device for the noise-cancelling headphones according to claim 1, characterized in that: The potential difference is obtained by the formula α×|T1-T2|-R, where α is the coefficient, T1 is the potential of the test point, T2 is the potential of the other test point, and R is the potential of the reference point.

3. The control device for the noise-cancelling headphones according to claim 1, characterized in that: The first electrode, the second electrode, the third electrode and the microcontroller are arranged on a flexible printed circuit board.

4. The control device for the noise-cancelling headphones according to claim 2, characterized in that: When the potential difference exceeds a threshold, the microcontroller transmits a control signal to the noise reduction earphone to automatically turn off the noise reduction function of the noise reduction earphone.

5. The control device for the noise-cancelling headphones according to claim 4, characterized in that: The threshold is 1.6V, and the coefficient is 1100.

6. The control device for the noise-cancelling headphones according to claim 1, characterized in that: The control device is arranged on the noise reduction earphone.

7. The control device for the noise-cancelling headphones according to claim 1, characterized in that: The microcontroller can automatically adjust the volume of the noise reduction headset according to the potential difference.

8. The control device for the noise-cancelling headphones according to claim 1, characterized in that: There is a first distance between the first electrode and the second electrode, a second distance between the first electrode and the third electrode, and a third distance between the second electrode and the third electrode. The first distance and the second distance are greater than the third distance.

9. The control device for the noise-cancelling headphones according to claim 1, characterized in that: Also includes: a plate body; and a rotating shaft element; The second electrode and the third electrode are arranged on the plate, and the plate is rotated by the rotating shaft element.

10. A method for controlling a noise reduction headset, comprising: Using a first electrode to detect a potential of a reference point on a user's face; Using a second electrode to detect the potential of a test point on the user's face; Using a third electrode to detect the potential of another test point on the user's face; Obtaining a potential difference generated by the facial muscles of the user using the potential of the reference point, the potential of the test point and the potential of the other test point, wherein the potential difference is obtained by multiplying the absolute value of the difference between the potential of the test point and the potential of the other test point by a coefficient and then subtracting the potential of the reference point; and Based on the potential difference exceeding a threshold, turning off a noise reduction function of the noise reduction headset; The first electrode detects the potential of the reference point on the user's face from a position closer to the user's ear than the second electrode and the third electrode.

11. The method for controlling the noise-cancelling headphones according to claim 10, wherein: The potential difference is obtained by the formula α×|T1-T2|-R, where α is the coefficient, T1 is the potential of the test point, T2 is the potential of the other test point, and R is the potential of the reference point.

12. The method for controlling the noise-cancelling headphones according to claim 10, wherein: The first electrode, the second electrode, the third electrode and a microcontroller are electrically arranged on a flexible printed circuit board.

13. The control method of the noise reduction earphone according to claim 11, characterized in that: The threshold is 1.6V, and the coefficient is 1100.

14. The control method of the noise reduction earphone according to claim 10, characterized in that: Also includes: The volume of the noise reduction headset is automatically adjusted according to the potential difference.

15. The method for controlling the noise-cancelling earphone according to claim 10, wherein: There is a first distance between the first electrode and the second electrode, a second distance between the first electrode and the third electrode, and a third distance between the second electrode and the third electrode. The first distance and the second distance are greater than the third distance.

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