CN107172516A - A kind of earphone and heart rate detection method - Google Patents
A kind of earphone and heart rate detection method Download PDFInfo
- Publication number
- CN107172516A CN107172516A CN201710386083.6A CN201710386083A CN107172516A CN 107172516 A CN107172516 A CN 107172516A CN 201710386083 A CN201710386083 A CN 201710386083A CN 107172516 A CN107172516 A CN 107172516A
- Authority
- CN
- China
- Prior art keywords
- signal
- earphone
- heart rate
- microphone
- rate detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 64
- 230000008859 change Effects 0.000 claims abstract description 21
- 210000000883 ear external Anatomy 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims description 33
- 230000001133 acceleration Effects 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 27
- 230000003044 adaptive effect Effects 0.000 claims description 22
- 230000001427 coherent effect Effects 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 210000004204 blood vessel Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000036541 health Effects 0.000 description 4
- 230000035485 pulse pressure Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000747 cardiac effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 210000000613 ear canal Anatomy 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 210000003454 tympanic membrane Anatomy 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The invention discloses a kind of earphone and heart rate detection method.The earphone includes setting one to be open on earphone outer covering, earphone outer covering, and closing housing is provided with earphone case, microphone is installed in closing housing, the surface of closing housing is provided with contact surface, and contact surface is arranged at opening, and when earphone is worn, the contact surface is in contact with the external ear of human ear.The heart rate detection method includes：When earphone is worn, the signal produced in closing housing by pressure change is gathered by microphone；The signal gathered according to microphone carries out heart rate detection.The present invention in earphone outer covering by setting closing housing, microphone is installed in closing housing, even if during so that the contact surface of earphone is with external ear incomplete contact between, closing housing still can be very good to be converted into skin vibrations into the vibration of gas in closing housing, microphone is still collected sufficiently strong heart rate signal.
Description
Technical field
The present invention relates to earphone and heart rate detection technical field, more particularly to a kind of earphone and heart rate detection method.
Background technology
With the continuous social and economic development, the living standard of people is increasingly improved, and people also increasingly pay close attention to certainly
Oneself health.And heart rate detection will give people to provide the very important information on health.It is any different from normal cardiac rate
Display all shows that health there is a problem, can find whether our body there is a problem in time by heart rate detection.The heart
Rate detection can also reflect whether the exercise intensity of people is suitable to a certain extent, in order to obtain optimal exercise effect
Really, heart rate should be maintained in certain scope by people during exercise, and heart rate detection can be rational motion
Amount provides an index.
In addition, many people like listening music with earphone, in order to measure in motion process during motion
Heart rate, need not carry with other equipment again, and how people detects the correlation technique of heart rate using earphone if beginning one's study.
Existing technology also has is close to duct formation closing space using earphone, due to ear vibration of membrane, can be produced in duct
Certain pressure is given birth to, and pressure changes with the change of vibration, and the change information of pressure in duct is gathered using microphone,
So as to reach the purpose of detection heart rate.But in practical application, it is often the case that the space that earphone is formed with duct it is closed
Property is unsatisfactory, and the pressure changing information that the microphone in the space is collected is fainter, it is difficult to detect heart rate.
The content of the invention
Based on one object of the present invention, the invention provides earphone and heart rate detection method, with the earphone and ear of solution
The seal in the space of road formation is undesirable, and the pressure change in the space is faint, the problem of microphone is difficult to collection.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
On the one hand, one is set to be open the invention provides a kind of earphone, including earphone outer covering, on earphone outer covering, ear casing
It is provided with vivo in closing housing, closing housing and microphone is installed, the surface of closing housing is provided with contact surface, the contact surface
At opening, when earphone is worn, contact surface is in contact with the external ear of human ear；The earphone also includes：Heart rate detection list
Member；
Microphone gathers the heart rate signal produced in closing housing by pressure change when earphone is worn；
Heart rate detection unit is electrically connected with microphone, and heart rate detection is carried out according to heart rate signal.
On the other hand, the invention provides a kind of heart rate detection method, one is set to open applied to earphone, on the earphone outer covering
Mouthful, it is provided with the earphone outer covering in closing housing, closing housing and microphone is installed, the surface of closing housing is provided with contact
Face, the contact surface is arranged at opening, and when earphone is worn, contact surface is in contact with the external ear of human ear；This method includes：
When earphone is worn, the signal produced in closing housing by pressure change is gathered by microphone；
The signal gathered according to microphone carries out heart rate detection
The beneficial effects of the invention are as follows：The present invention is pacified by setting closing housing in earphone outer covering in closing housing
Fill microphone so that even if the contact surface of earphone is with external ear incomplete contact between, closing housing still can be very good skin
Vibration is converted into the vibration of gas in closing housing, microphone is still collected sufficiently strong heart rate signal.
Brief description of the drawings
Fig. 1 is Headphone structure block diagram provided in an embodiment of the present invention；
Fig. 2 is the side view of earphone mounting structure provided in an embodiment of the present invention；
Fig. 3 is the rearview of earphone mounting structure provided in an embodiment of the present invention；
The Headphone structure block diagram that Fig. 4 picks up for support voice provided in an embodiment of the present invention；
Fig. 5 is the Headphone structure block diagram of heart rate measuring under support motion conditions provided in an embodiment of the present invention；
Fig. 6 is the structural representation of sef-adapting filter provided in an embodiment of the present invention；
Fig. 7 is heart rate detection method flow chart provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
In the technology of existing headset detection heart rate, usual microphone is directly placed at the position just to duct in earphone
Put, the ear cavity pressure change information for gathering eardrum generation, but earphone outer covering and duct during due to actual use
Effect of fitting might not closely, and the seal in the space that earphone outer covering is surrounded with auditory canal wall is unsatisfactory, therefore is located at
The pressure changing information that microphone in the space is collected is fainter, it is difficult to detect heart rate；And due to earphone outer covering and ear
The seal in the space that road wall is surrounded is poor so that the microphone in the space also suffers from the interference of outside noise, causes
Heart rate detection result is simultaneously unreliable.
Based on above-mentioned situation, a kind of mounting means of microphone is devised in earphone shown in Fig. 1 of the invention, specifically can be with
Referring to Fig. 2-3；Wherein, Fig. 1 is Headphone structure block diagram provided in an embodiment of the present invention, and Fig. 2 is ear provided in an embodiment of the present invention
The side view of machine mounting structure, Fig. 3 is the rearview of earphone mounting structure provided in an embodiment of the present invention.
As Figure 1-3, the earphone of the present embodiment includes setting an opening 101, ear on earphone outer covering 10, earphone outer covering 10
It is provided with casing body 10 in closing housing 20, closing housing 20 and microphone 30 is installed, the surface of closing housing 20 is provided with
At contact surface 201, the construction opening 101 of contact surface 201, and contact surface 201 is in contact with the external ear of human ear when earphone is worn；
Preferably, contact surface is elastic material, so that vibrational energy is preferably delivered in closing housing by external ear.
As shown in figure 1, the earphone of the present embodiment also includes：Heart rate detection unit 40；
Microphone 30 gathers the heart rate signal produced in closing housing 20 by pressure change when earphone is worn；
Heart rate detection unit 40 is electrically connected with microphone 30, and heart rate detection is carried out according to heart rate signal；Heart rate detection list
Member 40 can detect the frequency (or cycle) of heart rate signal using existing autocorrelation method, threshold method etc..
External ear described in the present embodiment includes auricle and external auditory meatus, is limited to human ear and the structure of earphone, the present embodiment
Opening 101 on earphone outer covering 10 preferably designs the position being in contact when earphone is worn with external auditory meatus, so that closing
Being contacted with external auditory meatus for the large area as far as possible of contact surface 201 of housing 20, strengthens the transmission effect of vibration.
As shown in figure 1, being to close in housing 20 just because air vibration changes position the most significant in closing housing 20
To the position of contact surface 201, therefore the present embodiment is preferably, the pickup hole 301 of microphone 30 and the contact surface of closing housing 20
201 are oppositely arranged, and the sound pressure variations for making to act on by pickup hole 301 on the vibrating diaphragm of microphone 30 are notable, strengthen Mike's elegance
The intensity of the heart rate signal collected；As shown in figure 3, in actual applications, contact surface 201 can also be set to protrude earphone outer covering 10
Surface, further increase contact surface and external auditory meatus contact area；Certainly, it is the integrality of guarantee earphone outer covering, can also
Contact surface 201 is set to be flushed with the surface of earphone outer covering 10；Contact surface 201 can be designed according to real needs, the present embodiment is to this
It is not especially limited.
It should be noted that being only to illustrate closing housing to be square in Fig. 2 and Fig. 3, the present embodiment does not limit envelope
The shape of closed shell body, may be designed in other shapes, such as cylindricality, trapezoidal shape etc.；The present embodiment does not also limit closing housing and existed
In mounting means in earphone outer covering, practical application, it can be installed by modes such as bondings.
It is understood that the present embodiment Fig. 2 and Fig. 3 illustrate the mounting structure of earphone, in the design of earphone
During can also include other related parts, the earphone cord 102 as shown in Fig. 2 or Fig. 3, loudspeaker etc. can basis
Application demand designs corresponding part, and this present embodiment is not specifically limited.
The earphone of the present embodiment is installed microphone in closing housing, made by setting closing housing in earphone outer covering
Even if obtain the contact surface of earphone with external ear incomplete contact between, closing housing still can be very good skin vibrations being converted into envelope
The vibration of gas in closed shell body, makes microphone still to collect sufficiently strong heart rate signal.
The earphone of the present embodiment has simple in construction, it is easy to accomplish advantage.
In view of in physics, for the space (not considering temperature) of closing, pressure and volume are inversely proportional, that is to say, that
The smaller pressure of volume is bigger, then the pressure acted on certain area is also bigger.After user takes earphone, due to blood vessel
Pulse pressure fluctuation causes ear wall to shrink, then can produce certain pressure change in the closing housing of earphone, pressure change letter
Number it will be detected by microphone.In general the pulse pressure fluctuation of blood vessel is very faint, and closed space is bigger, then microphone
The pressure change detected is smaller, and in order to increase the intensity for the heart rate signal that microphone is detected, the present embodiment fills microphone
Put in the small shell of a closing, small shell is close to external auditory meatus, because the pulse pressure fluctuation of blood vessel causes external auditory meatus ear wall to produce
Raw to shrink vibration, this vibrates the change for causing the microphone in small shell to detect pressure；And the design of small shell can reduce
The influence of external interference signal.
In an implementation of the present embodiment, the earphone in Fig. 1 also includes filter unit and correcting unit；
Filter unit is electrically connected with microphone 30 and filter unit respectively, and the signal that microphone 30 is gathered is filtered
Correcting unit is sent to after processing；Correcting unit is also electrically connected with heart rate detection unit 40, and the signal after correction is sent to
Heart rate detection unit 40；Heart rate detection unit 40 is detected to the cycle of the signal after wave shape correcting, by the signal detected
The inverse in cycle obtains heart rate.
The filter unit of this implementation is preferably by bandpass filter, to filter out High-frequency Interference and low-frequency disturbance.It is high
Frequency interference is primarily referred to as outside noise, and low-frequency disturbance is primarily referred to as by limb motion, the low-frequency disturbance that such as rotary head campaign is produced.
When designing bandpass filter, the cutoff frequency of frequency (0.5Hz-4Hz or so) design bandpass filter that can be based on pulse beat
Rate.
The correcting unit of this implementation can be corrected the waveform of filtered signal, and signal shape is unusual
Part is adjusted, and such as normalizing technology using crest is handled filtered signal, obtains regular heart rate signal,
Recycle the calculating cycle of the signal after the 40 pairs of corrections of heart rate detection unit, at the cycle of signal after calculating correction, it is necessary to according to
According to normal cardiac rate (40bpm-200bpm), the change in signal strength of the adjacent time objective law such as less calculates the cycle of signal.
In a practical situation, influence of the body kinematics of people to heart rate detection is also inevitable.Because, the body of people
Motion inevitably results in the vibration of ear wall, and the pressure change in the closing housing that this vibration is produced can equally be examined by microphone
Measure.So, the data that microphone is collected not only include because the pulse pressure of blood vessel fluctuates the pressure changing information produced, together
When include the pressure changing information that the body kinematics of people is produced in duct.In order to eliminate shadow of the body kinematics to heart rate detection
Ring, one embodiment of the present of invention adds acceleration transducer in earphone, and acceleration sensor apparatus is not contacted in earphone
The position of skin, than the earphone position shown in dotted line frame as shown in Figure 2.
What the signal that microphone is collected included is the ear canal pressure change information caused by body kinematics, acceleration sensing
What device was collected is the corresponding acceleration information of body kinematics, and both signals have the same vibration frequency, based on this,
The present embodiment eliminates the interference produced by the body kinematics of people by using subordinate's implementation.
In an implementation of the present embodiment, the earphone in Fig. 1 also includes acceleration transducer, adaptive-filtering list
Member and subtrator；
Acceleration transducer is electrically connected with adaptive-filtering unit, when earphone is worn, and is gathered due to wearer's
The signal that body kinematics is produced；
Adaptive-filtering unit is electrically connected with subtrator, and the signal that acceleration transducer is gathered adaptively is filtered
Ripple processing, obtain in the signal that microphone is collected due to wearer body kinematics produce signal estimation signal it is concurrent
Give subtrator；
Subtrator is electrically connected with microphone 30 and heart rate detection unit 40 respectively, the signal collected from microphone 30
In subtract the estimation signal, obtain heart rate coherent signal and be sent to heart rate detection unit 4 and adaptive-filtering unit；
Heart rate detection unit 40, is detected to the cycle of heart rate coherent signal, by the inverse of the signal period detected
Obtain heart rate.
By the space of earphone is limited, it is necessary to be weighed between the function of being supported and number of devices of earphone, it is
The voice signal of user can also be picked up by improving the microphone in the utilization ratio of each functional part, the present embodiment.
With reference to Fig. 4, Fig. 4 is earphone in the Headphone structure block diagram provided in an embodiment of the present invention for supporting voice to pick up, Fig. 4
Structure and the structure difference of earphone in Fig. 1 are that the earphone in Fig. 4 also includes judging unit 50, high frequency compensation unit 60
With processor 70；
Judging unit 50 is electrically connected with high frequency compensation unit 60, and whether judge the current mode of operation of earphone is that voice is picked up
Modulus formula；
Exemplary, if earphone is provided with operation select button, every kind of mode of operation correspondence trigger event judges single
First 50 quarters judge whether earphone is in voice pickup mode according to the trigger event for judging to occur；Certain judging unit 50 can also
Judge whether earphone is in voice pickup mode by other generations, such as judging unit 50 is also electrically connected with microphone, received
The signal of microphone pickup, whether be voice signal, when being identified as voice signal if recognizing the signal, judges that earphone is in voice
Pickup mode.
High frequency compensation unit 60 is electrically connected with microphone 30 and processor 70 respectively, judges that earphone is worked as in judging unit 50
When preceding mode of operation is not voice pickup mode, the signal received is not handled and forwarded；Sentence in judging unit 50
When the current mode of operation of disconnected earphone is voice pickup mode, the signal that microphone 30 is gathered is sent to after carrying out high frequency compensation
Processor 70；
Processor 70 carries out corresponding signal transacting according to the signal after high frequency compensation, such as sends out the signal after high frequency compensation
It is sent to loudspeaker to play out, or the signal after high frequency compensation is subjected to speech recognition, is identified and used based on speech recognition results
Family authority etc..
The voice pick-up method of the present embodiment is particularly suitable for use in noisy environment, in noisy environment, is transmitted by air
Come signal-to-noise ratio of voice signals can be than relatively low, it is difficult to the voice of recognition of speech signals, and the microphone of the present embodiment due in
In the closing housing of seal well, the voice passed over when can be spoken for pickup earphone wearer by skin is believed
Number, the influence of bad border noise is relatively low so that the higher signal of signal to noise ratio that microphone is picked up, it is ensured that processor recognizes standard
Really, clearly voice.
For ease of understanding the Headphone structure of the present invention, the present invention is specifically described by following embodiments.
Fig. 5 is the Headphone structure block diagram of heart rate measuring under support motion conditions provided in an embodiment of the present invention, as shown in figure 5,
The structure difference of earphone is in the structure and Fig. 1 of earphone in Fig. 5, and the earphone in Fig. 5 also includes filter unit 80, correction
Unit 90, acceleration transducer 110, adaptive-filtering unit 120 and subtrator 130, wherein, adaptive-filtering unit 120
Including Parameter adjustable wave filter 1201 and parameter adaptive adjustment unit 1202.
As shown in figure 5, the output end of microphone 30 connects the input of filter unit 80, the connection correction of the output end of filter unit 80
The input of unit 90, the output end of the correcting unit 90 connection first input end of subtrator 130；Acceleration transducer 110 connects respectively
Connect the first input end of Parameter adjustable wave filter 1201 and parameter adaptive adjustment unit 1202, parameter adaptive adjustment unit
The input of 1202 output end Connecting quantity tunable filter 1,201 second, the output end of Parameter adjustable wave filter 1201 connection subtraction list
First 130 second inputs, the adaptive input of adjustment unit 1,202 second of the output end Connecting quantity of subtrator 130.Wherein, filter
The function of ripple unit 80 and correcting unit 90 is as it was previously stated, will not be repeated here.
And the acceleration transducer 110 in Fig. 5, when earphone is worn, collection is produced by the body kinematics of wearer
Raw signal is simultaneously exported to the Parameter adjustable wave filter 1201 and parameter adaptive adjustment unit in adaptive-filtering unit 120
1202。
Parameter adaptive adjustment unit 1202, the signal collected according to acceleration transducer 110, heart rate coherent signal with
And default adaptive algorithm removes the filtering parameter of adjusting parameter tunable filter 1201.
Parameter adjustable wave filter 1201, the signal gathered using filtering parameter to acceleration transducer 110 carries out adaptive
Filtering, export the estimation signal of signal produced by the body kinematics due to wearer in the signal that Mike's elegance 30 collects to
Subtrator 130.
The estimation of the output of Parameter adjustable wave filter 1201 is subtracted in subtrator 130, the signal exported from correcting unit 90
Signal, obtains heart rate coherent signal and exports to heart rate detection unit 40；Subtrator 130, also by heart rate coherent signal export to
Parameter adaptive adjustment unit 1202.
Here parameter adaptive adjustment unit 1202 is gathered according to the acceleration transducer 110 of input signal and subtraction
The heart rate coherent signal that unit 130 feeds back, the filtering parameter of Parameter adjustable wave filter 1201 is calculated using adaptive algorithm.
Heart rate detection unit 40, heart rate detection is carried out according to the related signal of heart rate；Exemplarily, heart rate detection unit 40
The cycle of heart rate coherent signal is detected using existing autocorrelation method, threshold method etc., by signal period for detecting
Inverse obtains heart rate.
Fig. 6 is the structural representation of sef-adapting filter provided in an embodiment of the present invention.As shown in fig. 6, adaptive-filtering
The main parameter adaptive adjustment unit two parts by Parameter adjustable wave filter and adjustment filter coefficient of device are constituted.Adaptive filter
Ripple device design when need not know the knowledge for the statistical property for having OFF signal in advance, it can in the course of work of oneself by
Gradually " understand " or estimate required statistical property, and the parameter of adjust automatically oneself on this basis, to reach optimum filtering
Effect.In Fig. 6, Ex (n) is desired signal, and In (n) is input signal, and Out (n) is output signal, and e (n) is evaluated error, e
(n)=Ex (n)-Out (n).The filter factor of sef-adapting filter is passed through predetermined adaptive algorithm by error signal control, e (n)
Adaptation coefficient is adjusted, finally make it that e (n) mean square error is minimum, now output signal most approaches desired signal.
In the earphone shown in Fig. 5, employ sef-adapting filter and the signal that acceleration transducer is collected is filtered
Ripple processing, with the signal for accurately estimating that microphone collects because human motion is produced.As shown in figure 5, y1 (n) is to accelerate
The signal that degree sensor 110 is collected, that is, correspond to the input signal in adaptive-filtering unit 120, and y2 (n) is adaptive-filtering
The output signal of unit 120, xL (n) represents corresponding desired signal,Correspondence error signal (mainly including heart rate signal).
YL (n) and y1 (n) has certain correlation, can be by designing suitable transmission function, to cause y1 (n) by adaptive
Output signal y2 (n) after wave filter approaches yL (n).Such as can be according to minimum mean square error criterion, when error signal is square
Desired value it is minimum when, output signal y2 (n) can be for effectively estimation yL (n), then afterwards just can be by human motion pair
The interference of heart rate detection is removed from the signal that microphone is collected, and the influence of interference signal is removed again.Microphone 30 passes through
Filter unit 80, correcting unit signal after 90s subtract signal of the acceleration transducer 110 after adaptive-filtering, obtain and
The related signal message of heart rateThe detection of heart rate is carried out based on this.The bounce of heart has certain periodicity, that
It is the signal with some cycles, the signal corresponding cycle can be obtained according to autocorrelation method, according to the cycle
Reciprocal calculate heart rate.
Detailed process is as follows：
It is assumed that the signal that microphone 30 is detected is：X (n)=y (n)+d (n), the letter that acceleration transducer 110 is detected
Number be y1 (n).
Wherein, y (n) represents that, due to the pressure change signal produced by the body kinematics of people, d (n) is represented due to blood stream
Move produced pressure change signal；Y1 (n) represents that due to the acceleration signal produced by the body kinematics of people n represents sampling
Time point.
X (n) signals after bandpass filtering, correction are changed into：XL (n)=yL (n)+dL (n).
Y1 (n) and y (n) are the signals that same motion is produced, and y1 (n) corresponding is acceleration information, y (n) correspondences
Be pressure information, although both corresponding amplitudes are different, but with identical vibration frequency.In order to which y (n) is disappeared from x (n)
Remove, selection sef-adapting filter (shock response is h (n)) is filtered to y1 (n), is obtained y2 (n)=y1 (n) * h (n), is made y2
(n) close to the pressure change signal yL (n) produced by the body kinematicses due to people of the x (n) after LPF.
It can be so expressed as because duct shrinks the signal produced：
The auto-adaptive parameter of wave filter is obtained using adaptive algorithm, and the method for realizing adaptive algorithm is a lot, such as
Can it be caused using the minimum method of mean square errorTake the filter coefficient obtained during minimum value.
Try to achieveAfterwards, according to the periodic characteristics of the signal, it is possible to use autocorrelation method, threshold method etc. came to its week
Phase is detected that reciprocal according to the cycle calculates heart rate.
Thus, the earphone in Fig. 5 results in heart rate of the people in various situations (quiet, motion etc.), to obtain
The health information of people, or people can be as the case may be by the amount of exercise control of oneself in a conjunction on this basis
In suitable scope.
It is corresponding with aforementioned headset embodiment, present invention also offers a kind of heart rate detection method embodiment, in method
In embodiment, heart rate detection method is applied to set one to be open on earphone, the earphone outer covering, and closing is provided with the earphone outer covering
Microphone is installed, the surface of closing housing sets contact surface, and contact surface is arranged at opening in housing, closing housing, and
Contact surface is in contact with the auricle of human ear when earphone is worn；The structure of earphone in the present embodiment is implemented referring to aforementioned headset
Example, will not be repeated here.
Fig. 7 is heart rate detection method flow chart provided in an embodiment of the present invention, as shown in fig. 7, this method includes：
S700, when earphone is worn, the signal produced in closing housing by pressure change is gathered by microphone.
S710, the signal gathered according to microphone carries out heart rate detection.
Wherein it is possible to carry out heart rate detection by following methods：
Processing is filtered to the signal that microphone is gathered, filtered signal is obtained；Preferably, microphone is gathered
Signal carries out bandpass filtering treatment, to filter out low-frequency disturbance information and high-frequency interferencing signal；Waveform is carried out to filtered signal
Correction, is detected to the cycle of the signal after wave shape correcting；Heart rate is obtained by the inverse of the signal period detected.
When being provided with acceleration transducer in earphone outer covering, the method in Fig. 7 also includes：
When earphone is worn, gathered by acceleration transducer due to the signal that the body kinematics of wearer is produced；
Accordingly, the signal gathered according to microphone carries out heart rate detection, specifically includes：
Adaptive-filtering processing is carried out to the signal that acceleration transducer is gathered, obtained in the signal that microphone is collected
Due to the estimation signal for the signal that the body kinematics of wearer is produced；The estimation letter is subtracted from the signal that microphone is collected
Number, obtain heart rate coherent signal；The cycle of heart rate coherent signal is detected；Obtained by the inverse of the signal period detected
Heart rate.Wherein, estimation signal can be obtained by following methods：
Signal, heart rate coherent signal and the default adaptive algorithm collected according to acceleration transducer calculates adaptive
Answer filtering parameter；The signal collected according to adaptive-filtering parameters on acceleration sensor carries out adaptive-filtering, is estimated
Signal is counted, specific method can be found in the associated description on adaptive-filtering unit 120 in Fig. 5, will not be repeated here.
In a preferred scheme of the present embodiment, the method in Fig. 7 also includes：Judging the current mode of operation of earphone is
No is voice pickup mode；
When the current mode of operation of earphone is not voice pickup mode, not to microphone gather signal carry out processing and
Forwarding；When the current mode of operation of earphone is voice pickup mode, high frequency compensation is carried out to the signal that microphone is gathered, obtained
Signal after high frequency compensation；Signal after high frequency compensation is sent to the processor of earphone, by processor according to the height received
Signal after frequency is compensated carries out corresponding signal transacting, and the signal after high frequency compensation can be sent to loudspeaker progress by such as processor
Play, or the signal after high frequency compensation is subjected to speech recognition, based on speech recognition results identification user right etc..
The voice pick-up method of the present embodiment is particularly suitable for use in noisy environment, in noisy environment, is transmitted by air
Come signal-to-noise ratio of voice signals can be than relatively low, it is difficult to the voice of recognition of speech signals, and the microphone of the present embodiment due in
In the closing housing of seal well, the voice passed over when can be spoken for pickup earphone wearer by skin is believed
Number, the influence of bad border noise is relatively low so that the higher signal of signal to noise ratio that microphone is picked up, it is ensured that processor recognizes standard
Really, clearly voice.
The specific executive mode of each step in the inventive method embodiment, may refer to the specific of earphone embodiment of the present invention
Content, will not be repeated here.
The foregoing is only a specific embodiment of the invention, under the above-mentioned teaching of the present invention, those skilled in the art
Other improvement or deformation can be carried out on the basis of above-described embodiment.It will be understood by those skilled in the art that above-mentioned tool
The purpose of the present invention is simply preferably explained in body description, and protection scope of the present invention should be defined by scope of the claims.
Claims (11)
1. set one to be open on a kind of earphone, it is characterised in that including earphone outer covering, the earphone outer covering, the earphone case
Inside it is provided with closing housing, the closing housing and microphone is installed, the surface of the closing housing is provided with contact surface, institute
Contact surface is stated at the opening, the contact surface is in contact with the external ear of human ear when earphone is worn；The earphone is also
Including：Heart rate detection unit；
The microphone gathers the heart rate signal produced in the closing housing by pressure change when earphone is worn；
The heart rate detection unit is electrically connected with microphone, and heart rate detection is carried out according to heart rate signal.
2. earphone according to claim 1, it is characterised in that the pickup hole of the microphone connects with the closing housing
Contacting surface is oppositely arranged.
3. earphone according to claim 1, it is characterised in that also including judging unit, high frequency compensation unit and processor；
The judging unit is electrically connected with high frequency compensation unit, and whether judge the current mode of operation of earphone is voice pickup mould
Formula；
The high frequency compensation unit is electrically connected with the microphone and the processor respectively, in the current mode of operation of earphone
When not being voice pickup mode, the signal received is not handled and forwarded；It is voice in the current mode of operation of earphone
During pickup mode, the signal that the microphone is gathered is sent to processor after carrying out high frequency compensation；
The processor carries out corresponding signal transacting according to the signal after high frequency compensation.
4. earphone according to claim 1, it is characterised in that also including filter unit and correcting unit；
The filter unit is electrically connected with the microphone, the filter unit respectively, the signal that the microphone is gathered
Correcting unit is sent to after being filtered processing；
The correcting unit is also electrically connected with the heart rate detection unit, and the signal after correction is sent into heart rate detection list
Member；
The heart rate detection unit is detected to the cycle of the signal after wave shape correcting, by the inverse of the signal period detected
Obtain heart rate.
5. earphone according to claim 1, it is characterised in that also including acceleration transducer, adaptive-filtering unit and
Subtrator；
The acceleration transducer is electrically connected with adaptive-filtering unit, when earphone is worn, and is gathered due to wearer's
The signal that body kinematics is produced；
The adaptive-filtering unit is electrically connected with subtrator, and the signal that the acceleration transducer is gathered carries out adaptive
Filtering process is answered, the estimation signal of the signal produced due to the body kinematics of wearer in the signal that microphone is collected is obtained
And it is sent to subtrator；
The subtrator is electrically connected with microphone and heart rate detection unit respectively, is subtracted from the signal that microphone is collected
The estimation signal, obtains heart rate coherent signal and is sent to the heart rate detection unit and the adaptive-filtering unit；
The heart rate detection unit, is detected to the cycle of heart rate coherent signal, is obtained by the reciprocal of signal period detected
To heart rate.
6. a kind of heart rate detection method, it is characterised in that applied to earphone, sets one to be open, outside the earphone on the earphone outer covering
It is provided with shell in closing housing, the closing housing and microphone is installed, the surface of the closing housing is provided with contact surface,
The contact surface is arranged at the opening, and when earphone is worn, the contact surface is in contact with the external ear of human ear；The side
Method includes：
When earphone is worn, the signal produced in the closing housing by pressure change is gathered by the microphone；
The signal gathered according to the microphone carries out heart rate detection.
7. heart rate detection method according to claim 6, it is characterised in that methods described also includes：
Whether judge the current mode of operation of earphone is voice pickup mode；
When the current mode of operation of earphone is not voice pickup mode, the signal that microphone is gathered is not handled and turned
Hair；When the current mode of operation of earphone is voice pickup mode, high frequency compensation is carried out to the signal that the microphone is gathered, obtained
Signal after to high frequency compensation；
Signal after high frequency compensation is sent to the processor of earphone, by processor according to the signal after the high frequency compensation received
Carry out corresponding signal transacting.
8. heart rate detection method according to claim 6, it is characterised in that the signal gathered according to the microphone is carried out
Heart rate detection, including：
Processing is filtered to the signal that the microphone is gathered, filtered signal is obtained；
Wave shape correcting is carried out to filtered signal, the cycle of the signal after wave shape correcting is detected；
Heart rate is obtained by the inverse of the signal period detected.
9. heart rate detection method according to claim 8, it is characterised in that filtered to the signal that the microphone is gathered
Ripple processing, including：
Bandpass filtering treatment is carried out to the signal that the microphone is gathered, to filter out low-frequency disturbance information and high-frequency interferencing signal.
10. heart rate detection method according to claim 1, it is characterised in that be also equipped with acceleration in the earphone outer covering
Sensor, further, methods described also include：
When earphone is worn, gathered by the acceleration transducer due to the signal that the body kinematics of wearer is produced；
Accordingly, the signal gathered according to the microphone carries out heart rate detection, including：
Adaptive-filtering processing is carried out to the signal that the acceleration transducer is gathered, obtained in the signal that microphone is collected
Due to the estimation signal for the signal that the body kinematics of wearer is produced；
The estimation signal is subtracted from the signal that microphone is collected, heart rate coherent signal is obtained；
The cycle of heart rate coherent signal is detected；
Heart rate is obtained by the inverse of the signal period detected.
11. heart rate detection method according to claim 10, it is characterised in that the letter gathered to the acceleration transducer
Number carry out adaptive-filtering processing, obtain in the signal that microphone is collected due to wearer body kinematics produce signal
Estimation signal, including：
Signal, heart rate coherent signal and the default adaptive algorithm collected according to acceleration transducer calculates adaptive filter
Wave parameter；
The signal collected according to the adaptive-filtering parameters on acceleration sensor carries out adaptive-filtering, obtains described estimating
Count signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710386083.6A CN107172516B (en) | 2017-05-26 | 2017-05-26 | Earphone and heart rate detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710386083.6A CN107172516B (en) | 2017-05-26 | 2017-05-26 | Earphone and heart rate detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107172516A true CN107172516A (en) | 2017-09-15 |
| CN107172516B CN107172516B (en) | 2024-04-02 |
Family
ID=59820983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710386083.6A Active CN107172516B (en) | 2017-05-26 | 2017-05-26 | Earphone and heart rate detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107172516B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113425276A (en) * | 2021-06-28 | 2021-09-24 | 南昌勤胜电子科技有限公司 | Heart rate monitoring method, earphone and computer storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1484018A1 (en) * | 2003-06-04 | 2004-12-08 | TECNODI S.r.L. | Hydraulic amplifier and detector device comprising this amplifier |
| CN104185107A (en) * | 2014-07-24 | 2014-12-03 | 歌尔声学股份有限公司 | Heart rate detection method of earphone and earphone capable of detecting heart rate |
| CN204145698U (en) * | 2014-08-25 | 2015-02-04 | 歌尔声学股份有限公司 | A kind of earphone that can detect heart rate |
| CN105249950A (en) * | 2015-10-29 | 2016-01-20 | 杨松 | Pressure signal acquisition device and human body physiology signal acquisition pad body |
| CN106551682A (en) * | 2015-09-24 | 2017-04-05 | 华为终端（东莞）有限公司 | A kind of earphone for measuring human body vital sign |
| CN207369229U (en) * | 2017-05-26 | 2018-05-15 | 北京小鸟听听科技有限公司 | A kind of earphone |
-
2017
- 2017-05-26 CN CN201710386083.6A patent/CN107172516B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1484018A1 (en) * | 2003-06-04 | 2004-12-08 | TECNODI S.r.L. | Hydraulic amplifier and detector device comprising this amplifier |
| CN104185107A (en) * | 2014-07-24 | 2014-12-03 | 歌尔声学股份有限公司 | Heart rate detection method of earphone and earphone capable of detecting heart rate |
| CN204145698U (en) * | 2014-08-25 | 2015-02-04 | 歌尔声学股份有限公司 | A kind of earphone that can detect heart rate |
| CN106551682A (en) * | 2015-09-24 | 2017-04-05 | 华为终端（东莞）有限公司 | A kind of earphone for measuring human body vital sign |
| CN105249950A (en) * | 2015-10-29 | 2016-01-20 | 杨松 | Pressure signal acquisition device and human body physiology signal acquisition pad body |
| CN207369229U (en) * | 2017-05-26 | 2018-05-15 | 北京小鸟听听科技有限公司 | A kind of earphone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113425276A (en) * | 2021-06-28 | 2021-09-24 | 南昌勤胜电子科技有限公司 | Heart rate monitoring method, earphone and computer storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107172516B (en) | 2024-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104244127B (en) | A kind of heart rate detection method applied to earphone and the earphone that heart rate can be detected | |
| AU2015349054B2 (en) | Method and apparatus for fast recognition of a user's own voice | |
| KR101660670B1 (en) | Heart rate detection method used in earphone and earphone capable of detecting heart rate | |
| CN107071647B (en) | A kind of sound collection method, system and device | |
| KR101660671B1 (en) | Heart rate detection method used in earphone and earphone capable of detecting heart rate | |
| CN104244125B (en) | A kind of heart rate detection method applied to earphone and the earphone that heart rate can be detected | |
| CN204145698U (en) | A kind of earphone that can detect heart rate | |
| CN104661153A (en) | Earphone sound effect compensation method and device as well as earphone | |
| CN109309889B (en) | Sound acquisition equipment and signal processing method, device and equipment thereof | |
| WO2022039988A1 (en) | Wearable audio device with inner microphone adaptive noise reduction | |
| CN112116918A (en) | Speech signal enhancement processing method and earphone | |
| US20230396940A1 (en) | Hearing aid having a sensor | |
| CN105323692B (en) | Method and apparatus for feedback inhibition | |
| CN106851459A (en) | In-Ear Headphones | |
| WO2019079948A1 (en) | Earphone and method for performing an adaptively self-tuning for an earphone | |
| CN104244126B (en) | A kind of heart rate detection method for being applied to earphone and the earphone that heart rate can be detected | |
| WO2022036761A1 (en) | Deep learning noise reduction method that fuses in-ear microphone and on-ear microphone, and device | |
| CN207369229U (en) | A kind of earphone | |
| CN107172516A (en) | A kind of earphone and heart rate detection method | |
| JP2011188334A (en) | Hearing aid | |
| CN210227657U (en) | Feedback type noise reduction pillow | |
| CN109729463A (en) | The compound audio signal reception device of sound wheat bone wheat of formula interactive voice earphone is worn for neck | |
| JP6018025B2 (en) | Sample information processing device | |
| EP4243449A2 (en) | Apparatus and method for speech enhancement and feedback cancellation using a neural network | |
| CN113630681A (en) | Active noise reduction earphone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220726 Address after: Room 1903, 19 / F, building D, Zhizhen building, No. 7 Zhichun Road, Haidian District, Beijing 100191 Applicant after: Bird innovation (Beijing) Technology Co.,Ltd. Address before: 100191 room 1801, block D, Zhizhen building, 7 Zhichun Road, Haidian District, Beijing Applicant before: BEIJING XIAONIAO TINGTING TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |