CN113456335A

CN113456335A - Snore stopping device based on expanding silencer

Info

Publication number: CN113456335A
Application number: CN202110360559.5A
Authority: CN
Inventors: 孙瑞峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-06
Filing date: 2021-04-06
Publication date: 2021-10-01
Also published as: CN113101037A; CN216257742U; CN215915184U; CN113101038A; CN217286265U

Abstract

The snore stopping device provided by the invention provides a technical scheme from the angle of 'effect' of eliminating the causal relationship of snore, adopts a noise elimination mode of mixing an expansion type and an active type, is limited by the limitation on the size of an expansion chamber caused by wearability, and unpredictably enables the transition frequency bands of the active type and the expansion type noise elimination characteristics to be superposed, so that the mixed noise elimination characteristics are balanced in the working frequency band, and an unexpected technical effect is obtained in the application of the snore stopping device field, so that the snore stopping device provided by the invention has the beneficial effects of wide applicability, large noise elimination quantity, wide noise elimination band, small size, light weight and low electric energy consumption.

Description

Snore stopping device based on expanding silencer

Technical Field

The invention relates to a snore stopping device based on an expansion type silencer.

Background

Hen according to incomplete statistics of random crowd survey, more than 30% of adults in China snore, the snore rate of men is 20% -25%, the snore rate of women is 5% -15%, and the proportion of men to women is about 3: 1. Furthermore, with age, the snoring rate is increasing. The snoring rate of a male in the age of 40-64 years is up to 60 percent, and the snoring rate of a female in the age of 40 percent.

The existing snore stopper adopts a technical scheme of eliminating the cause of the causal relationship of snore, namely a technical scheme of eliminating a snore sound source, for example, a device which enables a snorer to hold the mouth to expand an airway so as to reduce the vibration and vortex generated by the uvula, thereby reducing or eliminating the snore; for example, after snore is detected, the human acupuncture points are stimulated, so that the muscles of the respiratory tract of the human body contract to change the acoustic characteristics such as the sectional area of the respiratory tract; for another example, the mouth of the snorer is closed by using a strap, but the prior art is difficult to adapt to all the snorers because the physiology and mechanism of the snore are complex and various, namely the applicability is poor.

On the other hand, the sound spectrum distribution of the snoring is regular and is basically in Gaussian distribution. Because the human sound frequency spectrum energy is basically concentrated in the frequency range of 200, 3500 Hz, the snore frequency of the soft jaw part is mostly distributed between 150 and 300Hz, the frequency of the sublingual part is mostly distributed between 500 and 750Hz, and the maximum value of the frequency spectrum distribution of the snore is near to 200Hz and 600Hz, the full frequency range of the snore 20, 5000 Hz is classified, wherein the frequency range of 20, 1000 Hz is a middle-low frequency range, the frequency range of 1000, 5000 Hz is a middle-high frequency range, and the snore energy is mainly concentrated in the middle-low frequency range of 20, 1000 Hz.

Active noise reduction or active noise elimination is a noise reduction technology, and is one of the methods applied to the technical field of earphone noise reduction, wherein a secondary sound source is used for generating noise reduction sound waves with the amplitude equal to that of external noise and the phase opposite to that of the external noise, and the noise reduction sound waves and the noise sound waves are superposed and neutralized in space (such as a cavity), so that the noise reduction effect is realized. The principle of the method is that all sounds are composed of certain frequency spectrums, if a sound can be found, the frequency spectrum of the sound is completely the same as the noise to be eliminated, the noise can be completely eliminated only by the phase which is just opposite, in other words, the active noise reduction technology needs to simultaneously meet the conditions of phase frequency and amplitude frequency.

Firstly, in terms of satisfying the amplitude-frequency condition, if active noise reduction is used in the frequency range of snore [20-5000] Hz, in order to satisfy the amplitude-frequency characteristic, the requirement on the performance index of the secondary sound source is extremely high, because the single-specification secondary sound source is difficult to provide sufficient bandwidth and gain frequency response performance in the full frequency channel, a (two-way) two-way frequency division system or a (three-way) three-way frequency division system is required to meet the requirement, and therefore the whole active noise reduction system is large in size and weight, and high in power consumption.

In addition, in the aspect of meeting the phase frequency condition, the noise reduction sound wave phase needs to follow the noise phase, and the noise sound wave phase is related to the acoustic characteristics of the cavity, as shown by the dashed line in fig. 8, in the [200, 500] Hz interval, the noise phase of the cavity jumps from-40 degrees to 100 degrees rapidly, the noise reduction system is difficult to realize the noise elimination function by following the noise phase jump rapidly, but generates additional noise, in practical application, a method of abandoning phase matching and reducing the amplitude of the noise reduction sound wave is adopted, and in the field of the snore stopper, because the wearable size of the snore stopper noise elimination cavity is limited, the inherent acoustic phase jump frequency band of the expansion chamber is overlapped with the frequency spectrum distribution maximum frequency band of the snore, therefore, the noise reduction capability of the existing active noise reduction technology used in the field of the snore stopper is seriously reduced, and the noise reduction capability of the active noise reduction technology in the high frequency band is insufficient, the snore stopper device is not suitable for being applied to wearable requirements, and the snore stopper device is convenient to express hereinafter, and is called an active noise reduction technology for short.

In the field of industrial passive silencers^[1]The expanding silencer includes expanding chamber and pipe, and the noise inside the pipe is attenuated or reflected back by means of the discontinuous acoustic impedance caused by the abrupt change of the noise in the cross section area of the joint between the pipe and the expanding chamber. Is characterized in that: first, as shown in equation 3 of fig. 6, the maximum muffling frequency f_eInversely proportional to the length dimension L of the expansion chamber, i.e. the lower the first maximum damping frequency, the larger the length dimension L of the expansion chamber. Secondly, as shown in formula 2 of fig. 6, the transmission loss TL or the amount of sound absorption of the expanding muffler is related to the expansion ratio m, i.e. the ratio of the cross sections of the expanding chamber and the pipe, and in the case that the expansion ratio m is greater than or equal to 1, the larger the expansion ratio m, the larger the transmission loss TL, which is also a characteristic that the expansion chamber requires a larger cross section dimension^[1]. Thirdly, the precondition that the wavelength to be eliminated is far less than the dimension of the expansion chamber must be satisfied, and a highest failure frequency f exists_sThis results in a non-snoring sound spectrumIf the expansion chamber is to be damped, the wavelength to be damped is much greater than the expansion chamber dimension, and the lowest failure frequency f is present_bWhen the frequency is lower than f_bIn the meantime, the distributed parametric analysis expansion silencer cannot be adopted any more, and

equations

2, 3 and 4 in fig. 6 no longer hold, but a centralized parametric analysis should be adopted, and the expansion silencer is degenerated into a helmholtz filter silencer, and only the connection topology of the helmholtz silencer and the noise path at this time is no longer a bypass but a series connection ^[2]. Therefore, the ideal working frequency range of the expanding muffler is [ f ]_b，f_s]。

According to the characteristics of the expansion silencer, the length L of the silencer of the industrial silencer is 85cm for eliminating low-frequency noise, such as noise around 100Hz, which is huge relative to the 20cm of the human head, and the limit of microminiaturization volume scale caused by the wearable requirement of the snore stopper is 20, 1000]Middle and low frequency band noise in Hz with wavelength range of [34, 1700%]cm, according to the head and face size of an adult^[3]The wearable device suitable for human head has a size not larger than 10cm, and the wavelength to be eliminated in low frequency band is far larger than the size of the wearable device, so that [20, 1000 ] in snore noise frequency spectrum]Component of middle or low frequency range of Hz, lower than or close to the lowest failure frequency f of the expanding silencer_bAnd the muffling ability or muffling performance of the expanding muffler is lost.

Field of industrial active silencer^[4]For example, the active noise elimination technical field of the noise of the exhaust pipe of the automobile engine is characterized in that one of the noise spectrums is wide, such as 1-10 kHz of combustion noise, 2-8 kHz of piston knocking noise, 0.5-2 kHz of noise of a valve actuating mechanism, more than 2 kHz of noise of an oil injection pump, less than 4 kHz of gear noise, 0.05-0.5 kHz of air inlet noise, 0.5-5 kHz of exhaust noise and 0.2-2 kHz of fan noise, wherein the exhaust noise is main noise, and the noise reduction working frequency band is far larger than the working frequency band of the snore stopper; the second one is that the expansion chamber has a large size which is far larger than the snore stopper.

As shown in fig. 16, 17 and 18The marking line in the middle is an active noise elimination characteristic curve, the dotted line is an expanded noise elimination characteristic curve, the noise elimination characteristics are assumed to be ideal characteristics for convenient analysis, the characteristic curve is divided into a horizontal section and a transition section which is monotonically decreased, and the frequencies of key characteristic points corresponding to the inflection points of the horizontal section and the transition section are respectively f₀And f₁It is known that the wearability of the snore stopper determines the dimensions of the expansion chamber, which in turn determine the key feature points f of the active and expanding acoustic characteristics₀And f₁It is also known that the larger the dimension of the expansion chamber of the expansion muffler is, the larger f₁The smaller, according to f₀And f₁The relative relationship between the two determines the mixed silencing performance of the active and expanding mixed mufflers, the solid line in the figure is the mixed silencing characteristic curve, in the aforementioned field of active silencing of automobiles, because the dimension of the expansion chamber is far larger than that of the expansion chamber of the snore stopper, the mixed silencing performance is as shown in fig. 16, while the mixed silencing performance of the snore stopper is as shown in fig. 17, as can be seen from the comparison between fig. 16 and 17, for mufflers in the field of automobiles, because f is the same as f₀Greater than f₁The active mode and the expansion type noise elimination characteristic transition frequency band are not overlapped, so that the advantage of making up for the deficiency between the mixed mufflers cannot be exerted, the mixed noise elimination characteristic is enabled to have obvious convex projection in the working frequency band, and the bandwidth is small.

As shown in fig. 18, when f₁F is much larger than₀In the process, the active type and the expanding type noise elimination characteristic transition frequency band are not overlapped or the overlapped part is less, so that the advantage of making the best of the advantages of the hybrid mufflers cannot be exerted, and the hybrid muffling characteristic is obviously sunken in the working frequency band, so that the noise elimination performance is seriously reduced.

The snore stopper provided by the invention is limited by the limitation on the dimension of the expansion chamber caused by the wearability, the unexpected mixed noise elimination characteristic is as shown in figure 17, the transition frequency band of the active noise elimination characteristic is overlapped with the transition frequency band of the expansion type noise elimination characteristic, so that the mixed noise elimination characteristic is balanced in the working frequency band and has large bandwidth, and therefore, the technical scheme of the active type mixing and the expansion type mixing obtains the unexpected technical effect in the application of the snore stopper field.

In summary, the specific spectral distribution of snoring and the size limitation of wearability^[3]The technical scheme for determining the snore stopper for the wearable scene has the difficulty that the snore stopper is microminiaturized, and the expansion type silencer has the snore noise of [20, 1000 ] due to the microminiaturized wearable requirement ]The silencing of the components in the Hz middle and low frequency ranges is failed or bad, and on the other hand, the active silencer is in the range of 1000, 5000 because the active silencer is difficult to phase match in the middle and high frequency ranges]The attenuation performance of the Hz middle and high frequency band is reduced, so that a technical scheme of a novel snore stopper combining the advantages of an active muffler and an expansion muffler is provided in the technical field of snore stoppers from the aspect of eliminating the 'effect' of the causal relationship of snoring, namely in the aspect of [20, 1000 ] of snoring]In the Hz middle and low frequency range, two noise elimination modes of active type and expanding type are used simultaneously, namely mixed noise elimination is carried out at the frequency of 1000, 5000]The Hz middle and high frequency band mainly adopts an expansion type, and an active silencing mode which can be selected as an auxiliary mode is adopted, so that an unexpected technical effect is obtained in the application of the snore stopper field, and the snore stopping device based on the expansion type silencer is provided.

It can be understood that, the dividing point 1000Hz of the middle and high frequency band is a parameter controlled by the length scale L of the expansion chamber, the longer the length L of the expansion chamber is, the more the dividing point of the middle and high frequency band is biased to the high frequency end, the equivalent value of the dividing point 1000Hz corresponding to the length scale of the expansion chamber is 5cm, and for convenience of expression, the 1000Hz is used as the dividing point of the middle and low frequency and middle and high frequency in the following.

Disclosure of Invention

The invention aims to provide a snore stopping device based on an expansion type silencer, and provides a technical scheme of a novel snore stopping device combining the advantages of an active type silencer and an expansion type silencer from the angle of 'fruit' for eliminating the causal relationship of snoring aiming at the defects of poor applicability, low silencing performance, large volume, heavy weight, high energy consumption and the like in the prior art.

The snore stopping device based on the expansion silencer is characterized by further comprising a wearable module and an active silencing module, wherein the expansion chamber is connected to the wearable module and the active silencing module respectively; wherein: the control module is respectively connected to the microphone and the secondary sound source, the expansion chamber is respectively communicated to the secondary sound source and the microphone on a gas path, and the control module drives the secondary sound source to emit reverse sound waves; the wearable module is respectively connected with a snoring organ and an expansion chamber of a human, the expansion chamber is connected with a tube, the tube is a respiratory airflow channel, and the tube is an acoustic device with acoustic impedance different from that of the expansion chamber.

The further technical scheme of the invention is that the connection between the active noise elimination module and the expansion chamber is detachable.

The invention also comprises an isolation chamber which is a cavity body communicated and connected between the wearable module and the expansion chamber on the air path respectively, and separates the direct connection between the wearable module and the expansion chamber.

The snore noise is eliminated by the medium-high frequency component in the isolation chamber and then eliminated by the expansion chamber.

According to a further technical scheme, the control module further comprises an audio bypass module, sound waves are generated in the expansion chamber through audio input by the bypass module through a secondary sound source and are not actively silenced, the sound waves enter the nasal cavity through the wearable module and are transmitted to the inner side of the eardrum through the eustachian tube and the middle ear cavity, and the vibration of the eardrum is caused to enable a person to hear.

The invention further adopts the technical scheme that the Bluetooth device also comprises a Bluetooth module which is respectively connected with the audio bypass module and the external wireless equipment, the Bluetooth module inputs audio signals from the external wireless equipment and then outputs the audio signals to the audio bypass module, and the external wireless equipment comprises a mobile phone, a computer and a tablet computer.

The invention also comprises a voice pickup microphone which is connected to the Bluetooth module and picks up the human voice audio signal, and then the human voice audio signal is output to the external wireless equipment through the Bluetooth module.

The wearable module comprises any one or combination of a nasal plug, a nasal mask, a mouth mask and an oronasal mask.

The further technical scheme of the invention is that the active noise elimination module can close the elimination of the high-frequency component of the snore noise.

The further technical scheme of the invention is that the topological structures of the microphone and the control module comprise a feed-forward type, a feedback type and a mixed type.

It is a further aspect of the present invention that the microphone is connected to one or a combination of the expansion chamber, the tube and the wearable module.

Advantageous effects

The snore stopping device based on the expansion type silencer, provided by the invention, has the advantages that firstly, the technical scheme is provided from the angle of 'effect' of the causal relationship of snore elimination, and the technical defects that the active silencing performance is reduced and the bandwidth is insufficient in middle and high frequency bands and the expansion type is in the middle and low frequency bands are overcome by adopting the silencing mode of mixing the expansion type and the active type, so that the snore stopping device has the beneficial effects of wide applicability, large silencing quantity, wide silencing band, small size, light weight and low electric energy consumption; secondly, the active silencing module is detachably connected with the expansion chamber, so that the problem of peculiar smell generated by breathing in the expansion chamber during cleaning is solved; moreover, the control module also comprises an audio bypass module which transmits the sound waves converted from the audio to the inner side of the eardrum through the nasal cavity, the eustachian tube and the middle ear cavity to cause the vibration of the eardrum to make people generate hearing, thereby solving the problem that the earphone is easy to fall off when the earphone is worn in a sleeping prone position; finally, the acoustic structure with the two cavities connected in series is formed by adding the isolation chamber, so that the problem of stability of the noise elimination performance caused by opening and closing behaviors of the mouth is solved.

Drawings

FIG. 1 is a schematic diagram;

FIG. 2 is a graph of transmission loss versus time;

FIG. 3 is a schematic view of the active muffler module being removable;

FIG. 4 is a schematic view of the first embodiment;

FIG. 5 is a wearing diagram of the first embodiment;

FIG. 6 is a graph of an expanded muffler calculation;

FIG. 7 is a wearing diagram of the second embodiment;

FIG. 8 is a diagram of the acoustic phase-frequency characteristics of the expansion chamber;

FIG. 9 is a schematic view of a third embodiment;

FIG. 10 is a schematic view of a fourth embodiment;

FIG. 11 is a diagram of a model acoustic system without an isolation chamber;

FIG. 12 is a mouth opening sound-electricity analog circuit diagram;

FIG. 13 is a close mouth acoustoelectric analog circuit diagram;

FIG. 14 is a diagram of a model of an acoustic system with an isolation chamber;

FIG. 15 is a mouth opening acousto-electric analog circuit diagram with an isolation chamber;

FIG. 16 is f₁Is less than f₀The mixed muffling characteristic map of (1);

FIG. 17 is f₁Greater than f₀The mixed muffling characteristic map of (1);

FIG. 18 is f₁Is much greater than f₀The mixed muffling characteristic map of (1);

reference numerals:

wearable Module-10;

left nasal obstruction-101;

right nasal prong-102;

bandage-103;

an expanding muffler-20;

an expansion chamber-201;

a tube-202;

an active silencing module-30;

secondary sound source-301;

a microphone-302;

a control module-303;

an audio bypass module-3031;

A key module-3032;

snoring organ-40;

an isolation chamber-50;

a partition plate-501;

principle of

The wearable using state of the snore stopping device is shown in figure 5, the principle of the wearable using state is shown in figure 1, and according to the structural parameters shown in figure 4, the inner cavity volume of the expansion chamber-201 is 125cm³The nasal plugs (left nasal plug-101 and right nasal plug-102) are air inlet pipes with the inner diameter of 8mm, the pipe-202 is an air outlet pipe with the inner diameter of 10mm, and the expansion type, the active type and the mixed type are respectively simulated by finite elements to calculate 3 transmission loss curves, wherein the expansion type refers to the working condition that only the expansion type silencer is used for silencing, the active silencing module-30 is not used simultaneously, the transmission loss TL (namely the silencing quantity) is as shown by the solid line in figure 2, the transmission loss bandwidth of the snore noise is narrow, for example, the snore noise is in the working condition of [20-500 mm []Transmission loss TL ∈ [5-16 ] in Hz medium-low frequency band]dB, while the noise elimination amount at the first maximum noise elimination point 2410Hz is 50dB, which indicates that under the condition that the wearable scale is limited, the expansion chamber volume scale cannot be increased like the noise eliminator in other technical fields, so as to reduce the frequency of the first maximum noise elimination point and improve the transmission loss bandwidth and the noise elimination amount of the frequency band smaller than the noise elimination point.

Therefore, in the middle-low frequency band where the expansion type silencer is invalid or bad, the expansion type silencer and the active noise elimination module work simultaneously, for example, the microphone and the control module adopt a feed-forward topological structure, the snore noise signal is collected by the microphone, the snore noise signal is processed by the control module, then the secondary sound source is driven to emit reverse sound waves, the snore noise signal and the snore noise signal are mutually counteracted in the cavity of the expansion chamber to achieve the purpose of snore stopping and noise elimination, the transmission loss is calculated through simulation and is shown as a dotted line in figure 2, in the interval of 100Hz and 1460 Hz, the acoustic effects of the active noise elimination module and the expansion type silencer are superposed, the transmission loss, namely the noise elimination performance is monotonically increased, the single active noise elimination module is shown as a dot-dash line in figure 2, the transmission loss (noise elimination) of the frequency band which is greater than 500hHz is obviously reduced by a solid line, and the loss curve of the single expansion type noise elimination is shown as figure 2, the transmission loss is low in the middle and low frequency bands, especially in the [20, 100] Hz range, and the transmission loss is close to or lower than the lowest distinguishable hearing of human, namely 3dB difference.

As shown by the dotted line in fig. 2, the theoretical value of the sound-deadening amount calculated according to equation 2 shown in fig. 6 for the expansion muffler is lower than the simulation value at the low frequency band of 200Hz, as compared with the finite element simulation value of the expansion muffler shown by the solid line in fig. 2, indicating that the expansion muffler starts to gradually reform into a helmholtz filter muffler. Therefore, the full frequency band of the snore [20, 5000] Hz can be divided into a helmholtz filter stage of [20, 200] Hz, an expansion type silencer front stage of [200, 1460] Hz and an expansion type silencer rear stage of [1460, 5000] Hz according to the configuration of the anti-type silencer, wherein 1460Hz is a dividing point of a middle-low frequency band and a middle-high frequency band related to the length L parameter of the expansion type silencer in specific application, but the representation is convenient, and 80% of the snore spectral energy is concentrated in [20, 1000] Hz, and still 1000Hz is a dividing point of the middle-high frequency band.

In the [500, 5000] Hz middle and high frequency band, the transmission loss or the noise elimination amount is mainly contributed by the expanding muffler, as shown in fig. 2, when the noise frequency is greater than 1610Hz, the influence of the active noise elimination module on the transmission loss curve of the middle and high frequency band is very small, so for the component greater than 1610Hz in the snore noise, the active noise elimination module of the snore stopping device of the invention can stop the noise elimination operation, and can save 20% of the power consumption, therefore, compared with a single active muffler, the snore stopping device of the invention has the advantages of low power consumption, low requirement on the electroacoustic performance parameter of the secondary sound source, and light structure weight. It should be specifically stated that the active noise elimination module can be turned off in the middle and high frequency bands, which is not equivalent to the situation that the active noise elimination module must be turned off, so that the active noise elimination module is still used in the middle and high frequency bands, and it should be understood that modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Can clean upThe expansion chamber has a dimension of 125^1/3=5cm, much smaller than the middle and low frequency band [20, 1000%]Hz (34-1700 cm), and the expanding silencer is at [20, 1000%]The sound elimination quantity and bandwidth performance of the Hz medium-low frequency band are reduced, and the filter gradually becomes a Helmholtz sound filter along with the reduction of the frequency. In the medium-low frequency band, the sound field analysis in the expansion chamber does not meet the condition of distribution parameters, centralized parameter analysis is adopted, the wave equation in the sound field can be considered to be a univariate function of time under the centralized parameters and is irrelevant to the space position, so that the secondary sound source is irrelevant to the installation position of the microphone and the active noise reduction performance, the microphone and the secondary sound source can be installed at the close position and designed into a module, the possibility is provided for the detachable installation requirement of the active noise reduction module, as the muffler for human breathing, peculiar smell can be generated in the expansion chamber under the condition of multiple use, the active noise reduction module belongs to an electronic device which must avoid water immersion, and as shown in figure 3, after the active noise reduction module-30 and the expansion chamber-201 are detached and separated, the expansion chamber-201 can be cleaned by water.

It will be appreciated that the volume scale of the expansion chamber is critical to the performance of the snore stopping device, and that if the volume scale is large, although better volume reduction and bandwidth performance can be achieved, this can lead to reduced wearability. The expandable size is small, and although the wearability is improved, the noise elimination volume and the bandwidth quality of the snore stopping device are reduced, and the volume of the expansion chamber is reduced in the limit condition because the diameter of the tube is limited by nostrils or the face ^[3]Cannot be changed greatly, and finally the volume of the expansion chamber is reduced to show that the expansion ratio m of the expansion type silencer is less than or equal to 1, and the modification, the equivalent replacement, the improvement and the like which are made within the spirit and the principle of the invention are also considered to be included in the protection scope of the invention.

It is understood that in the case of m >1, in order to improve the wearability, further reduce the volume of the expansion chamber, and continuously reduce the expansion ratio, the expanded sound-eliminating quantity has less contribution to the snore stopper than the active sound-eliminating quantity, and the myopic thought that the snore stopper is transformed into the active sound-eliminating quantity, and the modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention are also considered to be included in the protection scope of the present invention.

As shown in fig. 16, 17 and 18, the dashed line in the graph is an active muffling amount characteristic curve, the dotted line is an expanding muffling amount curve, it is assumed for analysis convenience that the muffling characteristics are ideal, the characteristic curve is divided into a horizontal segment and a transition segment that monotonically decreases, and the frequencies of key characteristic points corresponding to inflection points of the horizontal segment and the transition segment are respectively f₀And f₁It is known that the wearability of the snore stopper determines the dimensions of the expansion chamber, which in turn determine the key feature points f of the active and expanding acoustic characteristics ₀And f₁It is also known that the larger the dimension of the expansion chamber of the expansion muffler is, the larger f₁The smaller, according to f₀And f₁The relative relationship between the two determines the mixed silencing performance of the active and expanding mixed mufflers, the solid line in the figure is the mixed silencing characteristic curve, in the aforementioned field of active silencing of automobiles, because the dimension of the expansion chamber is far larger than that of the expansion chamber of the snore stopper, the mixed silencing performance is as shown in fig. 16, while the mixed silencing performance of the snore stopper is as shown in fig. 17, as can be seen from the comparison between fig. 16 and 17, for mufflers in the field of automobiles, because f is the same as f₀Greater than f₁The active mode and the expansion type noise elimination characteristic transition frequency band are not overlapped, so that the advantage of making up for the deficiency between the mixed mufflers cannot be exerted, the mixed noise elimination characteristic is enabled to have obvious convex projection in the working frequency band, and the bandwidth is small.

It will be appreciated that the topology between the microphone-302 and the control module-303 includes both feed-forward and feedback, and a hybrid of both approaches.

It is understood that the wearable module-10 includes a nose plug, a nose mask, an oral mask, an oronasal mask, wherein the nose plug is inserted into the nostril, the nose mask covers the nostril, the oral cavity and the nasal cavity are covered by the oral mask or the oronasal mask, and the nose plug has a hollow ventilation structure and is inserted into the nostril when in use.

It will be understood that the "tube-202" is an acoustic device having an acoustic impedance different from that of the expansion chamber, and that an impedance discontinuity is created at the junction of the "tube-202" and the expansion chamber-201, and thus the shape of the "tube-202" is not limited to the concept of a tube's structural shape, in other words, the "tube-202" can be any acoustic device having an acoustic impedance discontinuity with the expansion chamber-201, including a porous structural device. As shown in FIG. 4, the acoustic impedance of the left prong-101 and the acoustic impedance of the expansion chamber-201 are not continuous, so the left prong-101 is acoustically a "tube-202" in concept, and functionally an implementation of the wearable module-10. As shown in fig. 7, the wearable module-10 is a mask, which seals and shields the nasal and oral organs, and forms an expansion chamber-201 together with the shielded facial skin, and the cross section of the interface between the wearable module and the nostrils has abrupt change and discontinuous acoustic impedance, and the structure of the nostrils is "tube-202".

In summary, the snore stopping device provided by the invention integrates the advantages of the expansion type silencer and the active type silencer, avoids the disadvantages of the expansion type silencer and the active type silencer, is limited by the limitation on the size of the expansion chamber caused by wearability, unexpectedly enables the mixed silencing characteristic to be as shown in fig. 17, the transition frequency band of the active type silencing characteristic and the transition frequency band of the expansion type silencing characteristic are overlapped, and enables the mixed silencing characteristic to be balanced in the working frequency band.

On the other hand, the snoring organ includes a nose and a mouth, wherein the nose plug or the nose mask is a wearable module, the mouth mask is a wearable module, the acoustic system model of the wearable module is shown in fig. 11 because of the periodical opening and closing of the mouth during snoring, and when the mouth is closed, the working environment of the active noise elimination module-30 mainly comprises an acoustic impedance network composed of the acoustic capacity Ca1, the acoustic mass Ma1 and the acoustic resistance Ra1 of the expansion chamber, and the electroacoustic analogy is shown in fig. 13; when the mouth is open, the acoustic capacity Ca2 of the mouth, the acoustic mass Ma2 and the acoustic resistance Ra2 of the lips, the acoustic capacity Ca1 and the acoustic mass Ma1 of the expansion chamber form an acoustic impedance network, and the electric analogy thereof is as shown in fig. 12, and as can be seen from the comparison between fig. 13 and fig. 12, the mouth is in an open or closed state, the acoustic capacity Ca2 corresponding to the mouth is acoustically connected in parallel or disconnected to the acoustic capacity Ca1 of the expansion chamber muffler, and the acoustic mass Ma2 corresponding to the lips is connected in series or disconnected to the acoustic mass Ma1 of the expansion chamber muffler, so that the open or closed state of the mouth has a great influence on the working environment of the active noise elimination module-30, and it is difficult to maintain stable noise reduction performance.

Meanwhile, when the mask is worn, as shown in fig. 11, due to air leakage between the mask and the skin, the acoustic characteristics of the mask can be equivalent to acoustic mass Ma4 and acoustic resistance Ra4, and the electric acoustic analogy circuit of the mask is as shown in fig. 12, after the acoustic mass Ma4 and the acoustic resistance Ra4 are connected in series, the acoustic mass Ma4 and the acoustic resistance Ra4 are connected in parallel to the acoustic volume Ca1 of the expansion chamber, and the working environment of the active noise elimination module-30 is directly influenced.

In order to solve the above-mentioned problems caused by mouth opening and closing behavior and air leakage, a double-cavity acoustic structure is adopted, i.e. an isolation chamber-50 is added and connected in series with an expansion chamber-201, the acoustic system is shown in fig. 14, the electroacoustic analog circuit is shown in fig. 15, it can be known from fig. 15 that the influence of the open or closed state of the mouth on the working environment of the active noise elimination module-30 can be greatly reduced and the stable noise reduction performance can be maintained by adjusting the parameters of Ma8 and Ca8, for example, the influence of the parameter change of the sound quality Ma2 of the lips on the acoustic characteristics of the expansion chamber-201 can be reduced by adjusting the sound quality Ma8 of the isolation chamber, because the sound quality Ma8 of the isolation chamber-50 is in inverse proportion to the vent hole diameter on the partition plate-501, the hole diameter can be reduced, Ma8 can be increased, and the relative property of Ma8 is far greater than the superimposed equivalent sound quality of Ma2, Ma4 and the like, so that the change in equivalent acoustic mass due to the mouth opening and closing action has a reduced or negligible effect on the acoustic characteristic parameters of the expansion chamber.

The double-cavity acoustic structure is further improved by adopting the scheme that the double-cavity acoustic structure is used for noise reduction and silencing in a frequency division mode according to different snore noise frequency spectrums and the characteristics of a silencing principle of the snore noise, wherein the snore noise is eliminated by the isolating chamber-50, medium-high frequency noise is eliminated by the expanding chamber-201 and the active silencer, so that the volume scale of the expanding chamber can be relatively smaller, and the volume scale of the isolating chamber can be relatively larger.

In summary, the periodic behavior of the mouth and the air leakage of the snore stopper device provided by the invention are another difficulty in designing the snore stopper, the technical scheme that the isolation chamber is added to form the dual-cavity acoustic structure is adopted, the influence of the open or closed state of the mouth on the working environment of the active noise elimination module-30 can be weakened, the stable noise reduction performance is kept and the adaptability to individual differences of a user group is improved by adjusting the parameters of the isolation chamber, such as the sound quality, the sound capacity and the like, in a set noise reduction working frequency band, the noise elimination acoustics and the electronic function module of the dual-cavity are subjected to division cooperation according to the characteristics of different snore noise frequency spectrums and the noise elimination principle, so that the noise reduction and the adaptability of the snore stopper device are improved.

In addition, the posture of a person is prone, if the person needs to listen to music or receive a call, an earphone is used in a traditional mode, but the earphone is easy to fall off in the prone position, when the snore stopper device is used, the control module further comprises an audio bypass module, audio input through the bypass module generates sound waves in the expansion chamber through a secondary sound source, the sound waves are not actively silenced, the sound waves enter the nasal cavity through the wearable module and are transmitted to the inner side of the eardrum through the eustachian tube and the middle ear cavity to cause the vibration of the eardrum to enable the person to hear, and in other words, the snore stopper device provided by the invention can replace the function of the earphone in the prone position.

Detailed Description

Specifically, as shown in fig. 4 and 5, the invention provides a first embodiment of an anti-snoring device based on an expansion silencer, which comprises a wearable module-10, an expansion silencer-20 and an active silencing module-30, wherein the wearable module-10 further comprises a left nasal plug-101 and a right nasal plug-102 with inner diameters of 8mm, the left nasal plug-101 and the right nasal plug-102 are made of medical grade soft silica gel materials and are respectively inserted into the left nostril and the right nostril of a person, a tube-202 is used for breathing and enters and exits the trachea with inner diameters of 10mm, and the volume of an expansion chamber is 125cm ³The length of the expansion chamber is approximately equal to 5cm, and the expansion ratio m is approximately equal to 32.

The expansion silencer-20 is a hollow cavity made of acrylic material, and the volume of the hollow cavity of the expansion chamber-201 is 125cm³The snore baffle is attached and matched with the face of a person, is respectively communicated with the left nasal plug-101, the right nasal plug-102 and the tube-202 on the air path, and has abrupt change of sectional area at the connecting part, so that discontinuity of acoustic impedance is formed, and snore noise is reflected and absorbed.

The active noise elimination module-30 also comprises a secondary sound source-301, a microphone-302 and a control module-303, wherein the microphone-302 and the active noise elimination module-30 adopt a feedback topology structure, the microphone-302 collects a deviation signal and sends the deviation signal to the control module-303, the control module-303 can be but is not limited to a filter, the deviation signal outputs a driving signal which is opposite to the snore noise signal after passing through the filter, the secondary sound source-301 is driven to emit an opposite-phase sound wave, and the sound wave is superposed with the snore noise in the expansion chamber-201 to realize the noise elimination function, so that the implementation of the invention can be realized, namely the technical scheme of the snore stopping device based on the expansion type silencer.

It will be appreciated that the wearable module-10 includes prongs (left prong-101 and right prong-102) having through holes that are in fluid communication with the expansion chamber-201, where the left and right prongs correspond to short tubes, and where the cross-sectional area of the tubes at the junction is much smaller than the cross-sectional area of the expansion chamber-201, thereby providing a discontinuity in acoustic impedance at the junction.

It will be appreciated that the left prong-101, the right prong-102, and the tube-202, which are the inlet and outlet conduits for breathing, may be inserted into the diverging chamber-201 to improve the performance of the expanding muffler-20, e.g., the prongs (101, 102) and the tube-202 are inserted into one-half and one-fourth of the diverging chamber-201, respectively^[1]And the tube-202 can be inserted into the expansion chamber-201 in its entirety so that the tube-202 does not leak out and has an aesthetic appearance.

It can be understood that the control module-303 further comprises an audio bypass module-3031 (also known as a music compensation module), the audio input through the bypass module-3031 is not actively silenced in the expansion chamber, and the audio is subjected to electro-acoustic transduction through the secondary sound source-301 to output sound waves, and the sound waves enter the nasal cavity through the wearable module, because the nasal cavity and the inner side of the human eardrum are communicated through the eustachian tube and the middle ear cavity, so that the vibration of the eardrum is caused to make the human generate hearing, therefore, the person using the snore stopping device provided by the invention can listen to the hypnotic music or the incoming call ringtone in use, and the inconvenience caused by using the earphone to achieve the same function is avoided, because the worn earphone is easy to fall off in a sleeping posture.

In addition, the active noise elimination module-30 further comprises a key module-3032, for example, a power switch for controlling the active noise elimination module-30, and at this time, the key sound effect is input into the audio bypass module-3031, so that the secondary sound source-301 emits key special sound, and the experience of operation and control is improved.

It can be understood that the expansion chamber-201 is a closed cavity in the present embodiment, and the acoustic characteristics thereof are stable, so that the noise reduction performance of the active noise elimination module-30 is stable, and the adaptability to different people is improved, but the external bandage is not used for shielding the snoring organ, namely the mouth, but is used for fixing the mouth in a closed state.

As shown in fig. 7, the present invention provides a second embodiment for a snore stopping device based on an expanding muffler, which is different from the first embodiment in that the wearable module-10 is a mask, and the part of the mask, which is in contact with the curved face of the face, is made of soft silica gel to hermetically shield the mouth and nose organs and form an expanding chamber-201 together with the skin of the face, so that the implementation of the present invention can be realized, namely the technical scheme of the snore stopping device based on the expanding muffler.

It can be understood that the semi-closed cavity formed by the mask and the facial skin tissue in the expansion chamber-201 of the present embodiment form a closed cavity, and because the skin has mechanical elasticity and tissue friction, the volume of the expansion chamber-201 and the sound resistance of passive noise absorption are equivalently increased, which is equivalent to the volume of the expansion chamber-201 and the sound absorption material.

It can be understood that, in the present embodiment, the semi-closed cavity formed by the mask of the expansion chamber-201 and the facial skin tissue together form a closed cavity, when a person snores, the mouth periodically opens and closes, and the opening of the mouth leads to the integration of the oral cavity and the cavity of the expansion chamber-201, so that the acoustic characteristics of the expansion chamber-201 also periodically change along with the periodic opening and closing of the mouth, which adversely affects the noise reduction performance of the active noise elimination module-30, and on the other hand, the nasal cavity and the oral cavity have different volumes, so that the present embodiment has poor applicability to people and human behaviors.

As shown in fig. 9, aiming at the technical deficiency of the second embodiment, the present invention provides a third embodiment for a snore stopping device based on an expansion silencer, which is different from the second embodiment in that an isolation chamber-50 is added between an expansion chamber-201 and a mask (wearable module-10), so that the cavity of the isolation chamber-50 and the cavity of the expansion chamber-201 are communicated with each other through a partition plate-501, and the value of a design parameter Ma8 is relatively large to reduce or eliminate the influence of the oral cavity sound quality Ma2 and the sound capacity Ca2 caused by the periodic opening and closing of the mouth on the acoustic characteristics of the expansion chamber-201, which is beneficial to the stability of the noise reduction performance of an active noise elimination module-30, and simultaneously shields the influence of the difference of the oral cavity and the nasal cavity of different people on the noise reduction performance, thereby improving the applicability of the snore stopping device provided by the present invention on the behaviors of people and human beings, the implementation of the invention can be realized, namely the technical scheme of the snore stopping device based on the expansion type silencer.

It can be understood that the isolation chamber-50 and the expansion chamber-201 form a double-cavity acoustic structure, that is, the isolation chamber and the expansion chamber are connected in series, wherein the snore noise firstly eliminates medium-high frequency noise through the isolation chamber-50, and then eliminates medium-low frequency noise through the expansion chamber and the active muffler, so that the volume scale of the expansion chamber can be relatively smaller, and the volume scale of the isolation chamber can be relatively larger.

As shown in fig. 10, the present invention provides a fourth embodiment for a snore stopping device based on an expansion type silencer, which is different from the first embodiment in that a pipe-202 is a porous structure device, and the acoustic impedance of the pipe-202 is not continuous with an expansion chamber-201, so that the present invention can be implemented, namely the present invention is a technical scheme of the snore stopping device based on the expansion type silencer.

In summary, the snore stopping device based on the expansion silencer provided by the invention comprises an expansion chamber and a pipe, and is characterized by further comprising a wearable module and an active silencing module, wherein the expansion chamber is respectively connected to the wearable module and the active silencing module, and the active silencing module comprises a secondary sound source, a microphone and a control module; wherein: the control module is respectively connected to the microphone and the secondary sound source, the expansion chamber is respectively communicated to the secondary sound source and the microphone on a gas path, and the control module drives the secondary sound source to emit reverse sound waves; the wearable module is respectively connected with a snoring organ and an expansion chamber of a human, the expansion chamber is connected with a tube, the tube is a respiratory airflow channel, and the tube is an acoustic device with acoustic impedance different from that of the expansion chamber. The snore stopping device based on the expansion type silencer, provided by the invention, has the advantages that firstly, the technical scheme is provided from the angle of 'effect' of the causal relationship of snore elimination, and the technical defects that the active silencing performance is reduced and the bandwidth is insufficient in middle and high frequency bands and the expansion type is in the middle and low frequency bands are overcome by adopting the silencing mode of mixing the expansion type and the active type, so that the snore stopping device has the beneficial effects of wide applicability, large silencing quantity, wide silencing band, small size, light weight and low electric energy consumption; secondly, the active silencing module is detachably connected with the expansion chamber, so that the problem of peculiar smell generated by breathing in the expansion chamber during cleaning is solved; moreover, the control module also comprises an audio bypass module which transmits the sound waves converted from the audio to the inner side of the eardrum through the nasal cavity, the eustachian tube and the middle ear cavity to cause the vibration of the eardrum to make people generate hearing, thereby solving the problem that the earphone is easy to fall off when the earphone is worn in a sleeping prone position; finally, the acoustic structure with the two cavities connected in series is formed by adding the isolation chamber, so that the problem of stability of the noise elimination performance caused by opening and closing behaviors of the mouth is solved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Reference to the literature

[1] Numerical analysis of the influence of structural parameters on the muffling performance of an expanded muffler

[2] Helmholtz resonance-based snore stopping device patent application number 2020101371201 Sun Runfeng 2020-03

[3] Adult head and face size (GB/T2428 and 1998) issued by the State quality and technical supervision agency

[4] The impedance control model of the single-chamber expansion type composite active muffler is Yizhen, Feren Yuan and Wubin vehicle-used engine 2005-06-30.

Claims

1. The snore stopping device based on the expansion type silencer comprises an expansion chamber and a pipe, and is characterized by further comprising a wearable module and an active silencing module, wherein the expansion chamber is connected to the wearable module and the active silencing module respectively; wherein: the control module is respectively connected to the microphone and the secondary sound source, the expansion chamber is respectively communicated to the secondary sound source and the microphone on a gas path, and the control module drives the secondary sound source to emit reverse sound waves; the wearable module is respectively connected with a snoring organ and an expansion chamber of a human, the expansion chamber is connected with a tube, the tube is a respiratory airflow channel, and the tube is an acoustic device with acoustic impedance different from that of the expansion chamber.

2. The snore stopping device based on the expanding muffler as claimed in claim 1, wherein the connection between the active muffling module and the expanding chamber is detachable.

3. The snore relieving device based on the expanding muffler as claimed in claim 1, wherein: the wearable module is communicated with the expansion chamber through the gas circuit, and the expansion chamber is communicated with the wearable module through the gas circuit.

4. The snore stopping device based on the expanding silencer of claims 1 and 3, wherein: snore noise is firstly eliminated by the middle-high frequency components in the isolation chamber, and then eliminated by the expansion chamber.

5. The snore stopping device based on the expanding muffler as claimed in claim 1, wherein the control module further comprises an audio bypass module, wherein audio input through the bypass module generates sound waves in the expanding chamber through a secondary sound source, the sound waves are not actively silenced, the sound waves enter the nasal cavity through the wearable module, and then are transmitted to the inner side of the eardrum through the eustachian tube and the middle ear cavity to cause the vibration of the eardrum to generate the auditory sense of a person.

6. The snore relieving device based on the expanding muffler as recited in claim 5, wherein: the Bluetooth module is respectively connected to the audio bypass module and external wireless equipment, the Bluetooth module inputs audio signals from the external wireless equipment and then outputs the audio signals to the audio bypass module, and the external wireless equipment comprises a mobile phone, a computer and a tablet computer.

7. The snore relieving device based on the expanding muffler as recited in claim 6, wherein: the voice pickup microphone is connected to the Bluetooth module, picks up a human voice audio signal, and outputs the human voice audio signal to external wireless equipment through the Bluetooth module.

8. The snore relieving device based on the expanding muffler as claimed in claim 1, wherein: the wearable module comprises any one or combination of a nasal plug, a nose mask, a mouth mask and an oronasal mask, and the wearable module is provided with an air hole structure.

9. The snore relieving device based on the expanding muffler as claimed in claim 1, wherein: the active silencing module can close silencing of high-frequency components of snore noise.

10. The snore relieving device based on the expanding muffler as claimed in claim 1, wherein: the topological structures of the microphone and the control module comprise a feed-forward type, a feedback type and a mixed type.

11. The snore relieving device based on the expanding muffler as recited in claim 10, wherein: the microphone is connected to one or a combination of the expansion chamber, the tube and the wearable module.