CN112634916A - Automatic voice adjusting method and device for defibrillator - Google Patents
Automatic voice adjusting method and device for defibrillator Download PDFInfo
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- 230000007613 environmental effect Effects 0.000 claims abstract description 23
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- G—PHYSICS
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- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/003—Changing voice quality, e.g. pitch or formants
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- A—HUMAN NECESSITIES
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- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
- A61N1/3904—External heart defibrillators [EHD]
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/90—Pitch determination of speech signals
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Abstract
The invention discloses a defibrillator voice automatic regulation method and a defibrillator voice automatic regulation device, which are used for collecting environmental noise data, extracting noise loudness, tone and timbre, regulating the defibrillator voice loudness according to a noise loudness parameter, regulating the defibrillator voice tone according to a noise tone parameter, regulating the defibrillator voice timbre according to a noise timbre parameter and synthesizing defibrillator voice according to the regulated defibrillator voice loudness, tone and timbre. The invention solves the problem of interference of environmental noise to an operator in the rescue process, improves the contrast from three dimensions of loudness, tone and timbre, is convenient for the operator to better eliminate the noise and hear the target sound, and increases the rescue success rate.
Description
Technical Field
The invention relates to the field of defibrillators, in particular to a voice automatic adjusting method and device of a defibrillator.
Background
Sudden death is one of the biggest challenges facing human and medicine in this century, sudden cardiac death is related to arrhythmia, and timely and effective electrical defibrillation is the most important emergency treatment for recovering the life of sudden cardiac death patients.
Defibrillation occurs frequently in noisy environments, especially in crowded environments such as train stations, airports, stadiums, etc. In these environments, emergency treatment is performed, and the environmental noise interferes with the operator's listening to the instructional voice of the equipment, thereby affecting the efficiency and success rate of emergency treatment.
The prior art carries out voice volume according to environmental noise, but the volume is only one element of sound and cannot achieve good effect. On one hand, in extremely noisy environments, the volume of ambient noise is already very high, and the volume of speech of the device is limited; on the other hand, the other two elements of the sound, namely the tone and the timbre, can obviously improve the auditory effect through a differentiation mode.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems, the invention provides a defibrillator voice automatic regulation method and a defibrillator voice automatic regulation device, which are used for collecting environmental noise, extracting noise loudness, tone and tone color, regulating the defibrillator voice loudness according to noise loudness parameters, regulating the defibrillator voice tone according to noise tone color parameters, improving contrast from three dimensions of the loudness, the tone and the tone color of the noise, and solving the interference of the environmental noise on an operator in the rescue process.
The technical scheme is as follows: in order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows: a method for automatic voice adjustment of a defibrillator comprising the steps of:
acquiring ambient noise around a defibrillator to obtain ambient noise data;
extracting the environmental noise data to obtain noise loudness, tone and timbre;
adjusting the voice loudness of the defibrillator according to the noise loudness parameter, adjusting the voice tone of the defibrillator according to the noise tone parameter, and adjusting the voice tone of the defibrillator according to the noise tone parameter;
and synthesizing the defibrillator voice according to the adjusted loudness, tone and tone of the defibrillator voice.
Further, the ambient noise around the defibrillator is collected, and the collection time interval is a gap period during which the defibrillator does not play voice.
Further, the extracting the environmental noise data to obtain the noise loudness, the tone and the tone includes the steps of:
extracting the maximum amplitude value of the time domain waveform of the noise signal, and filtering; then, the maximum value of the amplitude within a period of time is averaged to obtain the average loudness within a period of time, and the average loudness is used as a noise loudness parameter;
fourier transform is carried out on the noise signal, and the frequency corresponding to the 1 st high point of the peak value after the Fourier transform is defined as the main frequency of the noise and is used as a noise tone parameter;
and performing Fourier transform on the noise signal, and defining the frequency corresponding to the 2 nd-4 th high point of the peak value after the transform as the harmonic wave of the noise as the noise tone color parameter.
Further, the method for adjusting the voice loudness of the defibrillator according to the noise loudness parameter, adjusting the voice tone of the defibrillator according to the noise tone parameter, and adjusting the voice tone of the defibrillator according to the noise tone parameter includes the steps of:
arithmetic addition is carried out on the noise loudness parameter, so that the voice loudness is higher than the noise loudness, and the loudness after arithmetic addition is taken as the voice loudness of the defibrillator;
carrying out frequency spectrum shifting on the noise tone parameter, shifting the voice dominant frequency to low frequency when the noise dominant frequency is at high frequency, shifting the voice dominant frequency to high frequency when the noise dominant frequency is at low frequency, and enabling the voice dominant frequency to be far away from the noise dominant frequency, wherein the shifted tone is used as the voice tone of the defibrillator;
and carrying out frequency spectrum transfer on the noise tone color parameters, carrying the voice harmonic to the low frequency when the noise harmonic is at the high frequency, carrying the voice harmonic to the high frequency when the noise harmonic is at the low frequency, and taking the transferred tone color as the voice tone color of the defibrillator.
A voice automatic regulating device of a defibrillator comprises an environmental noise collecting module, a voice processing module and a voice processing module, wherein the environmental noise collecting module is used for collecting environmental noise around the defibrillator to obtain environmental noise data;
the environment noise data extraction module is used for extracting the environment noise data to obtain noise loudness, tone and tone;
the defibrillator voice adjusting module is used for adjusting the voice of the defibrillator, and comprises the steps of adjusting the voice loudness of the defibrillator according to the noise loudness parameter, adjusting the voice tone of the defibrillator according to the noise tone parameter, and adjusting the voice tone of the defibrillator according to the noise tone parameter;
and the defibrillator voice synthesis module is used for synthesizing the defibrillator voice according to the adjusted defibrillator voice loudness, tone and tone.
Further, the ambient noise data extraction module includes a noise loudness extraction unit, a noise tone extraction unit, and a noise tone extraction unit.
Further, the defibrillator voice adjusting module comprises a defibrillator voice loudness adjusting unit, a defibrillator voice tone adjusting unit and a defibrillator voice tone adjusting unit.
Has the advantages that: according to the invention, by collecting three factors of loudness, tone and tone of the environmental noise and adjusting the voice of the defibrillator, the difference between the voice of the equipment and the environmental noise is improved, an operator can hear the guiding voice of the equipment conveniently, the interference of the environmental noise to the operator in the rescue process is solved, and the rescue success rate is increased.
Drawings
Fig. 1 is a flow chart of the defibrillator voice automatic adjustment method of the present invention.
Fig. 2 is a loudness adjustment flow chart.
Fig. 3 is a flow chart of adjusting a tone.
Fig. 4 is a flow chart of adjusting timbre.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the method for automatically adjusting the voice of the defibrillator according to the present invention comprises the steps of:
(S1) acquiring ambient noise around the defibrillator, resulting in ambient noise data including noise loudness, pitch, and tone;
wherein, the acquisition time interval is the interval period when the defibrillator does not play voice.
(S2) extracting the ambient noise data to obtain noise loudness, pitch and tone;
extracting the maximum amplitude value of the time domain waveform of the noise signal, and filtering; and then, the maximum value of the amplitude within a period of time is averaged to obtain the average loudness within a period of time, and the average loudness is used as a noise loudness parameter.
And performing Fourier transform on the noise signal, and defining the frequency corresponding to the 1 st high point of the transformed peak value as the main frequency of the noise as a noise tone parameter.
And performing Fourier transform on the noise signal, and defining the frequency corresponding to the 2 nd-4 th high point of the peak value after the transform as the harmonic wave of the noise as the noise tone color parameter.
The 2 nd-4 th high points refer to spectral points where the maximum of the spectral peak is 2 nd-4 th high. For example, the dominant frequency of the noise is 100Hz, its even harmonics are 200Hz, 400Hz, 600Hz., and its odd harmonics are 300Hz, 500Hz, 700Hz.. Meanwhile, fundamental waves other than 100Hz are contained in the noise, and it is assumed that harmonics of 110Hz, 120Hz, and 130Hz themselves are 220Hz, 240Hz, 260Hz, 330Hz, 360Hz, 390Hz, and the like. The three points with the highest peak among these harmonics are selected as the 2 nd to 4 th high spectral points.
(S3) adjusting the voice loudness of the defibrillator according to the noise loudness parameter, adjusting the voice tone of the defibrillator according to the noise tone parameter, and adjusting the voice tone of the defibrillator according to the noise tone parameter;
and performing arithmetic addition on the noise loudness parameter to enable the voice loudness to be higher than the noise loudness, and taking the loudness after the arithmetic addition as the voice loudness of the defibrillator.
And carrying out frequency spectrum shifting on the noise tone parameters, shifting the voice dominant frequency to low frequency when the noise dominant frequency is at high frequency, shifting the voice dominant frequency to high frequency when the noise dominant frequency is at low frequency, and enabling the voice dominant frequency to be far away from the noise dominant frequency, wherein the shifted tone is used as the voice tone of the defibrillator.
And carrying out frequency spectrum transfer on the noise tone color parameters, carrying the voice harmonic to the low frequency when the noise harmonic is at the high frequency, carrying the voice harmonic to the high frequency when the noise harmonic is at the low frequency, and taking the transferred tone color as the voice tone color of the defibrillator.
(S4) synthesizing the defibrillator speech based on the adjusted defibrillator speech loudness, pitch, and tone.
As shown in fig. 2, the step of adjusting the speech loudness of the defibrillator is:
(S11) inputting a noise loudness parameter set to a;
(S12) carrying out arithmetic addition on the noise loudness parameter to obtain loudness B, and taking the loudness B after the arithmetic addition as the voice loudness; b is A + X, X > 0, make the loudness B of speech higher than loudness A of noise;
(S13) obtaining the voice loudness of the defibrillator, and amplifying the amplitude of the preset voice waveform in a same ratio according to the voice loudness of the defibrillator; and if the preset voice signal is f (t), the amplified voice signal is f (t) × B/A.
As shown in fig. 3, the step of adjusting the defibrillator voice tone is:
(S21) inputting a noise pitch parameter;
(S22) carrying out frequency spectrum shifting on the tone parameters, wherein when the noise dominant frequency is at a high frequency, the voice dominant frequency is shifted to a low frequency, and when the noise dominant frequency is at a low frequency, the voice dominant frequency is shifted to the high frequency, so that the voice dominant frequency is far away from the noise dominant frequency;
the frequency range of the sound is 20Hz-20KHz, the embodiment temporarily defines 20Hz-660Hz as low frequency, and 660Hz-20KHz as high frequency. However, the sounds near 20Hz and near 20KHz are generally difficult to hear, and in order to ensure better hearing effect, the lower limit of 100Hz and the upper limit of 10KHz are limited during moving. For example, if the noise dominant frequency is 100Hz, the language dominant frequency is shifted to 3.3 KHz; the noise dominant frequency is 500Hz, the language dominant frequency is shifted to 10 KHz.
(S23) obtaining a defibrillator voice tone.
As shown in fig. 4, the step of adjusting the tone of the defibrillator voice is:
(S31) inputting tone color parameters;
(S32) carrying out frequency spectrum shifting on the tone parameters, shifting the voice harmonic to low frequency when the noise harmonic is at high frequency, and shifting the voice harmonic to high frequency when the noise harmonic is at low frequency, so that the voice tone and the noise tone form difference;
when the harmonic wave is moved, the lower limit of 100Hz and the upper limit of 10KHz are limited to ensure better hearing effect as the main frequency is moved. The method for harmonic movement is the same as the method for main frequency movement, and the differences are that the number of harmonic movement is more, the movement process is more complicated, and single adjustment may be carried out by high frequency movement to low frequency and low frequency movement to high frequency, because the 2 nd-4 th high point may have both high frequency band and low frequency band.
(S33) obtaining a defibrillator voice tone.
After the loudness, tone and tone of the voice of the defibrillator are obtained respectively, the three parameters are synthesized, and the voice of the defibrillator expected to be broadcasted is obtained.
The voice automatic adjusting device of the defibrillator comprises an environmental noise acquisition module, a voice recognition module and a voice recognition module, wherein the environmental noise acquisition module is used for acquiring environmental noise around the defibrillator to obtain environmental noise data; the environment noise data extraction module is used for extracting the environment noise data to obtain noise loudness, tone and tone; the defibrillator voice adjusting module is used for adjusting the voice of the defibrillator, and comprises the steps of adjusting the voice loudness of the defibrillator according to the noise loudness parameter, adjusting the voice tone of the defibrillator according to the noise tone parameter, and adjusting the voice tone of the defibrillator according to the noise tone parameter; and the defibrillator voice synthesis module is used for synthesizing the defibrillator voice according to the adjusted defibrillator voice loudness, tone and tone.
The ambient noise data extraction module includes a noise loudness extraction unit, a noise tone extraction unit, and a noise tone extraction unit. The defibrillator voice adjusting module comprises a defibrillator voice loudness adjusting unit, a defibrillator voice tone adjusting unit and a defibrillator voice tone adjusting unit.
Claims (7)
1. A defibrillator voice automatic adjustment method is characterized by comprising the following steps:
acquiring ambient noise around a defibrillator to obtain ambient noise data;
extracting the environmental noise data to obtain noise loudness, tone and timbre;
adjusting the voice loudness of the defibrillator according to the noise loudness parameter, adjusting the voice tone of the defibrillator according to the noise tone parameter, and adjusting the voice tone of the defibrillator according to the noise tone parameter;
and synthesizing the defibrillator voice according to the adjusted loudness, tone and tone of the defibrillator voice.
2. The method of claim 1, wherein the ambient noise around the defibrillator is collected, and the collection time interval is a gap period during which the defibrillator does not play voice.
3. The defibrillator voice autoregulation method of claim 1, wherein the extracting the ambient noise data to obtain noise loudness, pitch and tone color comprises the steps of:
extracting the maximum amplitude value of the time domain waveform of the noise signal, and filtering; then, the maximum value of the amplitude within a period of time is averaged to obtain the average loudness within a period of time, and the average loudness is used as a noise loudness parameter;
fourier transform is carried out on the noise signal, and the frequency corresponding to the 1 st high point of the peak value after the Fourier transform is defined as the main frequency of the noise and is used as a noise tone parameter;
and performing Fourier transform on the noise signal, and defining the frequency corresponding to the 2 nd-4 th high point of the peak value after the transform as the harmonic wave of the noise as the noise tone color parameter.
4. The method of claim 1, wherein the adjusting of the loudness of the defibrillator speech according to the noise loudness parameter, the pitch of the defibrillator speech according to the noise pitch parameter, and the tone of the defibrillator speech according to the noise tone parameter, comprises the steps of:
arithmetic addition is carried out on the noise loudness parameter, so that the voice loudness is higher than the noise loudness, and the loudness after arithmetic addition is taken as the voice loudness of the defibrillator;
carrying out frequency spectrum shifting on the noise tone parameter, shifting the voice dominant frequency to low frequency when the noise dominant frequency is at high frequency, shifting the voice dominant frequency to high frequency when the noise dominant frequency is at low frequency, and enabling the voice dominant frequency to be far away from the noise dominant frequency, wherein the shifted tone is used as the voice tone of the defibrillator;
and carrying out frequency spectrum transfer on the noise tone color parameters, carrying the voice harmonic to the low frequency when the noise harmonic is at the high frequency, carrying the voice harmonic to the high frequency when the noise harmonic is at the low frequency, and taking the transferred tone color as the voice tone color of the defibrillator.
5. An automatic voice adjusting device of a defibrillator is characterized by comprising
The environmental noise acquisition module is used for acquiring environmental noise around the defibrillator to obtain environmental noise data;
the environment noise data extraction module is used for extracting the environment noise data to obtain noise loudness, tone and tone;
the defibrillator voice adjusting module is used for adjusting the voice of the defibrillator, and comprises the steps of adjusting the voice loudness of the defibrillator according to the noise loudness parameter, adjusting the voice tone of the defibrillator according to the noise tone parameter, and adjusting the voice tone of the defibrillator according to the noise tone parameter;
and the defibrillator voice synthesis module is used for synthesizing the defibrillator voice according to the adjusted defibrillator voice loudness, tone and tone.
6. The defibrillator voice automatic adjustment device of claim 5, wherein the ambient noise data extraction module comprises a noise loudness extraction unit, a noise tone extraction unit and a noise tone extraction unit.
7. The defibrillator voice automatic regulating device of claim 5, wherein the defibrillator voice regulating module comprises a defibrillator voice loudness regulating unit, a defibrillator voice tone regulating unit and a defibrillator voice tone regulating unit.
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