Bone conduction earphone and control method thereof

Abstract

The invention discloses a bone conduction earphone and a control method thereof, and relates to the technical field of bone conduction earphones, and the bone conduction earphone comprises a power supply unit for providing electric energy, a sound production unit for playing a sound production role, and a control unit for playing a control role. The power supply unit and the sound production unit are electrically connected with the control unit; the sound production unit comprises a signal processing assembly used for processing received audio signals, a vibration assembly used for playing a vibration role and a contact assembly used for making contact with a user. The signal processing assembly is provided with a filtering assembly used for optimizing the quality of audio signals, and the filtering assembly is used for preprocessing the signals through filters connected in series; the convenient control method is realized by adopting the signal processing assembly, the vibration assembly and the contact assembly; the quality and performance of the audio signal are optimized by adopting the filtering assembly, the signal is preprocessed by adopting the filter, and the tone quality effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of bone conduction earphones, and in particular to a bone conduction earphone and a control method thereof. Background Art

[0002] Bone conduction headphones are a type of headphones that transmit sound through bones rather than air. The core of this technology is to use the human bones to conduct sound waves, thereby bypassing the outer ear and middle ear and directly transmitting sound signals to the inner ear. No physical insertion into the ear canal is required, so the risk of damage to the ear is relatively low. The prior art uses signal processing components, vibration components and contact components to achieve a convenient control method. No filtering components are used to optimize the quality and performance of audio signals. Therefore, in view of this situation, there is an urgent need to develop a bone conduction headphone and a control method thereof to meet the needs of actual use. Summary of the invention

[0003] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a bone conduction headset and a control method thereof, which processes audio signals, generates vibrations and transmits them to users through contact components by adopting signal processing components, vibration components and contact components, and the control method is convenient and easy to implement; the quality and performance of audio signals are optimized by adopting filtering components, and the signal is pre-processed by adopting filters, thereby improving the sound quality.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A bone conduction headset, comprising A power supply unit for providing electrical energy; A sound unit for producing sound; A control unit for controlling; The power supply unit and the sound generating unit are both electrically connected to the control unit; The sound-generating unit includes a signal processing component for processing a received audio signal, a vibration component for vibrating, and a contact component for contacting a user; Control method of this bone conduction headset: The audio signal is transmitted from the external device to the bone conduction headset; the signal processing component processes the received audio signal; the vibration component receives the audio signal processed by the signal processing component and starts to generate mechanical vibration; the vibration generated by the vibration component is transmitted to the user through the contact component, and the vibration is transmitted along the user's bones and finally reaches the auditory receptors in the inner ear; The signal processing component has a filter component for optimizing the quality and performance of the audio signal. The filter component adjusts the distribution of zero poles and the equalization weights of different frequency bands to achieve equalization under nonlinear scales. The filter component preprocesses the signal through a series of filters.

[0005] As a preferred solution: the filter includes a low-pass filter that allows low-frequency signals to pass through but blocks high-frequency signals from passing through, and a high-pass filter that allows high-frequency signals to pass through but blocks low-frequency signals from passing through, and the low-pass filter and the high-pass filter are connected in series.

[0006] As a preferred solution: the filter also includes a bandpass filter that allows signals within a specific frequency range to pass through but blocks signals of other frequencies from passing through, and a bandstop filter that blocks signals within a specific frequency range from passing through but allows signals of other frequencies to pass through, and the low-pass filter, high-pass filter, band-pass filter and band-stop filter are connected in series.

[0007] As a preferred solution: the vibration component uses a piezoelectric ceramic material that can convert sound signals into vibration signals and transmit them into the ear. The piezoelectric constant d is a parameter that measures the strength of the piezoelectric effect of the piezoelectric ceramic material. After the piezoelectric ceramic is polarized, the applied electric field E and the strain S that can be generated are in a linear relationship: S=dE.

[0008] As a preferred solution: the dielectric constant of the piezoelectric ceramic material is a parameter reflecting the dielectric properties of the material, and the dielectric constant is represented by ε: ε=Ct / A, where: C is the capacitance (F), A is the electrode area (m 2 ), t is the distance between electrodes (m), and ε is the dielectric constant (F / m).

[0009] As a preferred solution: the mechanical quality factor Qm of the piezoelectric ceramic material represents the degree of energy loss due to internal friction, etc. when the piezoelectric ceramic performs mechanical-electrical energy conversion. The higher the mechanical quality factor, the less the energy loss. Qm=2л(W1 / W2), W1 is the mechanical energy stored in the piezoelectric material during resonance; W2 is the energy lost by mechanical damping per cycle of the piezoelectric material during resonance.

[0010] As a preferred solution: the outer surface of the piezoelectric ceramic material is covered with a flexible material, which can reduce the resonance frequency and the mechanical quality factor, thereby widening the frequency range, and the flexible material includes a silicone plate.

[0011] As a preferred solution: the vibration component includes a low-frequency working mode using a piezoelectric ceramic material with a low-frequency response and a high-frequency working mode using a piezoelectric ceramic material with a high-frequency response. After the full-frequency signal is received by a sound receiving device, the signal is divided into a high-frequency signal and a low-frequency signal through a filtering link. The high-frequency signal corresponds to the high-frequency working mode, and the low-frequency signal corresponds to the low-frequency working mode.

[0012] As a preferred solution: the sound receiving device includes a microphone, the high-frequency signal and the low-frequency signal are respectively input into a power amplifier for amplification, and the amplified signals are input into the corresponding piezoelectric ceramic material to drive its vibration to be transmitted to the user.

[0013] As a preferred solution: the filtering component implements filtering processing on the signal through a digital signal processor.

[0014] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that the functional operation of the bone conduction headset is realized by adopting a power supply unit, a sound unit and a control unit; the audio signal is processed, vibration is generated and transmitted to the user through the contact component by adopting a signal processing component, a vibration component and a contact component, and the control method is convenient and easy to implement; the quality and performance of the audio signal are optimized by adopting a filtering component, and the signal is pre-processed by adopting a filter, thereby improving the sound quality effect.

[0015] In order to more clearly illustrate the structural features and effects of the present invention, it is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of the control method of the bone conduction earphone of the present invention; Figure 2 This is a working principle diagram of the power supply unit, sound generating unit and control unit of the present invention. DETAILED DESCRIPTION

[0017] The present invention Figure 1 to Figure 2 As shown, a bone conduction headset comprises A power supply unit for providing electrical energy; A sound unit for producing sound; A control unit for controlling; The power supply unit and the sound generating unit are both electrically connected to the control unit; The sound-generating unit includes a signal processing component for processing a received audio signal, a vibration component for vibrating, and a contact component for contacting a user; Control method of this bone conduction headset: The audio signal is transmitted from the external device to the bone conduction headset; the signal processing component processes the received audio signal; the vibration component receives the audio signal processed by the signal processing component and starts to generate mechanical vibration; the vibration generated by the vibration component is transmitted to the user through the contact component, and the vibration is transmitted along the user's bones and finally reaches the auditory receptors in the inner ear; The signal processing component has a filter component for optimizing the quality and performance of the audio signal. The filter component adjusts the distribution of zero poles and the equalization weights of different frequency bands to achieve equalization under nonlinear scales. The filter component preprocesses the signal through a series of filters.

[0018] The filter includes a low-pass filter that allows low-frequency signals to pass through and blocks high-frequency signals from passing through and a high-pass filter that allows high-frequency signals to pass through and blocks low-frequency signals from passing through, and the low-pass filter and the high-pass filter are connected in series.

[0019] The filter also includes a bandpass filter that allows signals within a specific frequency range to pass through and blocks signals of other frequencies from passing through, and a bandstop filter that blocks signals within a specific frequency range from passing through and allows signals of other frequencies to pass through. The low-pass filter, high-pass filter, bandpass filter and bandstop filter are connected in series.

[0020] The vibration component uses piezoelectric ceramic materials that can convert sound signals into vibration signals and transmit them into the ear. The piezoelectric constant d is a parameter that measures the strength of the piezoelectric effect of the piezoelectric ceramic material. After the piezoelectric ceramic is polarized, the applied electric field E is linearly related to the strain S that can be generated: S=dE.

[0021] The size of the piezoelectric constant directly determines the driving ability of the piezoelectric ceramic material. The larger the piezoelectric constant d is, the stronger its driving ability is.

[0022] The dielectric constant of the piezoelectric ceramic material is a parameter that reflects the dielectric properties of the material. The dielectric constant is expressed as ε: ε=Ct / A, where: C is the capacitance (F), A is the electrode area (m 2 ), t is the distance between electrodes (m), and ε is the dielectric constant (F / m).

[0023] The mechanical quality factor Qm of the piezoelectric ceramic material indicates the degree of energy loss due to internal friction, etc. when the piezoelectric ceramic performs mechanical-electrical energy conversion. The higher the mechanical quality factor, the less the energy loss. Qm=2л(W1 / W2), where W1 is the mechanical energy stored in the piezoelectric material during resonance; W2 is the energy lost by mechanical damping per cycle of the piezoelectric material during resonance.

[0024] The higher the mechanical quality factor Qm, the more the vibration at a certain frequency will be strengthened or weakened; if the piezoelectric ceramics are used in piezoelectric bone conduction hearing devices, the sound signal will be distorted at a certain frequency. To avoid this problem, try to use materials with low Qm.

[0025] The outer surface of the piezoelectric ceramic material is covered with a flexible material, which can reduce the resonance frequency and the mechanical quality factor so as to widen the frequency range. The flexible material includes a silicone plate.

[0026] The vibration component includes a low-frequency working mode using a piezoelectric ceramic material with a low-frequency response and a high-frequency working mode using a piezoelectric ceramic material with a high-frequency response. After the full-frequency signal is received by a sound receiving device, the signal is divided into a high-frequency signal and a low-frequency signal through a filtering link. The high-frequency signal corresponds to the high-frequency working mode, and the low-frequency signal corresponds to the low-frequency working mode.

[0027] The sound receiving device includes a microphone. The high-frequency signal and the low-frequency signal are respectively input into a power amplifier for amplification. The amplified signals are input into corresponding piezoelectric ceramic materials to drive the vibration thereof and transmit it to the user.

[0028] The filter component implements filtering processing on the signal through a digital signal processor.

[0029] Types of filters: Low-pass filter (LPF): allows low-frequency signals to pass through, but blocks high-frequency signals. Its application scenario is: the low-pass filter in bone conduction headphones can help reduce high-frequency noise and make low-frequency sounds clearer; this is especially important for improving the clarity of voice calls.

[0030] High-pass filter (HPF): allows high-frequency signals to pass through, but blocks low-frequency signals. Its application scenario: The high-pass filter can remove low-frequency noise, such as wind or low-frequency background noise, and make the mid- and high-frequency sounds more prominent; this is very important for music playback and speech recognition.

[0031] Bandpass filter (BPF): allows signals within a specific frequency range to pass through, while blocking signals of other frequencies; Application scenario: The bandpass filter can optimize the sound of a specific frequency band, such as the human voice band, making it clearer and more natural.

[0032] Band-stop filter (BSF): blocks signals within a specific frequency range and allows signals of other frequencies to pass; Application scenario: Band-stop filters can remove interference signals in a specific frequency band, such as power line noise or interference from other electronic devices.

[0033] Application of filters: Audio signal preprocessing: Before the audio signal enters the vibration unit, the filter can preprocess the signal to remove unnecessary noise and interference, ensuring that the signal transmitted to the vibration unit is purer; Sound quality optimization: The filter can optimize the sound quality of the audio signal by adjusting the proportion of different frequency components, making it more balanced and pleasant; Reduce sound leakage: By removing unnecessary high-frequency components through the filter, the sound leakage that may occur during the vibration transmission process can be reduced, thereby improving privacy protection; Enhance voice clarity: For voice calls and voice recognition applications, the filter can enhance the signal in the human voice frequency band, reduce background noise, and improve call quality and recognition accuracy.

[0034] The usage and principle of the bone conduction headset are as follows: The audio signal is transmitted from the external device to the bone conduction earphone; the signal processing component processes the received audio signal; the vibration component receives the audio signal processed by the signal processing component and starts to generate mechanical vibration; the vibration generated by the vibration component is transmitted to the user through the contact component, the vibration propagates along the user's bones, and finally reaches the auditory receptors in the inner ear.

[0035] The design focus of the present invention is to realize the functional operation of the bone conduction headphones by adopting a power supply unit, a sound unit and a control unit; to realize the processing of audio signals, generate vibrations and transmit them to the user through the contact components by adopting signal processing components, vibration components and contact components, and the control method is convenient and easy to implement; to optimize the quality and performance of audio signals by adopting filtering components, and to realize preprocessing of signals by adopting filters, thereby improving the sound quality effect.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A bone conduction headset, characterized in that: include A power supply unit for providing electrical energy; A sound unit for producing sound; A control unit for controlling; The power supply unit and the sound generating unit are both electrically connected to the control unit; The sound-generating unit includes a signal processing component for processing a received audio signal, a vibration component for vibrating, and a contact component for contacting a user; Control method of this bone conduction headset: The audio signal is transmitted from the external device to the bone conduction headset; the signal processing component processes the received audio signal; the vibration component receives the audio signal processed by the signal processing component and starts to generate mechanical vibration; the vibration generated by the vibration component is transmitted to the user through the contact component, and the vibration is transmitted along the user's bones and finally reaches the auditory receptors in the inner ear; The signal processing component has a filter component for optimizing the quality and performance of the audio signal. The filter component adjusts the distribution of zero poles and the equalization weights of different frequency bands to achieve equalization under nonlinear scales. The filter component preprocesses the signal through a series of filters.

2. The bone conduction earphone according to claim 1, characterized in that: The filter includes a low-pass filter that allows low-frequency signals to pass through and blocks high-frequency signals from passing through, and a high-pass filter that allows high-frequency signals to pass through and blocks low-frequency signals from passing through, and the low-pass filter and the high-pass filter are connected in series.

3. The bone conduction earphone according to claim 2, characterized in that: The filter also includes a bandpass filter that allows signals within a specific frequency range to pass through and blocks signals of other frequencies from passing through, and a bandstop filter that blocks signals within a specific frequency range from passing through and allows signals of other frequencies to pass through. The low-pass filter, high-pass filter, bandpass filter and bandstop filter are connected in series.

4. The bone conduction earphone according to claim 1, characterized in that: The vibration component uses a piezoelectric ceramic material that can convert sound signals into vibration signals and transmit them into the ear. The piezoelectric constant d is a parameter that measures the strength of the piezoelectric effect of the piezoelectric ceramic material. After the piezoelectric ceramic is polarized, the applied electric field E is linearly related to the strain S that can be generated: S=dE.

5. The bone conduction earphone according to claim 4, characterized in that: The dielectric constant of the piezoelectric ceramic material is a parameter reflecting the dielectric properties of the material, and the dielectric constant is represented by ε: ε=Ct / A, where: C is capacitance, A is electrode area, t is the distance between electrodes, and ε is the dielectric constant.

6. The bone conduction earphone according to claim 4, characterized in that: The mechanical quality factor Qm of the piezoelectric ceramic material indicates the degree of energy loss due to internal friction, etc. when the piezoelectric ceramic performs mechanical-electrical energy conversion. The higher the mechanical quality factor, the less the energy loss. Qm=2л(W1 / W2), where W1 is the mechanical energy stored in the piezoelectric material during resonance; W2 is the energy lost by mechanical damping per cycle of the piezoelectric material during resonance.

7. The bone conduction earphone according to claim 6, characterized in that: The outer surface of the piezoelectric ceramic material is covered with a flexible material, which can reduce the resonance frequency and the mechanical quality factor so as to widen the frequency range. The flexible material includes a silicone plate.

8. The bone conduction earphone according to claim 4, characterized in that: The vibration component includes a low-frequency working mode using a piezoelectric ceramic material with a low-frequency response and a high-frequency working mode using a piezoelectric ceramic material with a high-frequency response. After the full-frequency signal is received by a sound receiving device, the signal is divided into a high-frequency signal and a low-frequency signal through a filtering link. The high-frequency signal corresponds to the high-frequency working mode, and the low-frequency signal corresponds to the low-frequency working mode.

9. The bone conduction earphone according to claim 8, characterized in that: The sound receiving device includes a microphone. The high-frequency signal and the low-frequency signal are respectively input into a power amplifier for amplification. The amplified signals are input into corresponding piezoelectric ceramic materials to drive their vibration and transmit them to the user.

10. The bone conduction earphone according to claim 1, characterized in that: The filtering component implements filtering processing on the signal through a digital signal processor.

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