CN210227657U - Feedback type noise reduction pillow - Google Patents
Feedback type noise reduction pillow Download PDFInfo
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- CN210227657U CN210227657U CN201920546069.2U CN201920546069U CN210227657U CN 210227657 U CN210227657 U CN 210227657U CN 201920546069 U CN201920546069 U CN 201920546069U CN 210227657 U CN210227657 U CN 210227657U
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Abstract
The embodiment of the utility model discloses pillow of making an uproar falls in feedback formula, this pillow of making an uproar falls in feedback formula includes: the pillow comprises a pillow body, a microphone and a processor, wherein the microphone is arranged on the upper surface of the pillow; the microphone is electrically connected with the processor; the microphone is used for collecting a noise signal, and the noise signal comprises environmental noise; the processor is used for carrying out self-adaptive filtering processing on the environmental noise to obtain a reverse cancellation signal; and adjusting the transfer function of the adaptive filter according to the environmental noise and the reverse cancellation signal until the noise heard by the human ear is zero, wherein the noise heard by the human ear comprises the reverse cancellation signal and the signal transmitted to the back of the human ear by the environmental noise. The transfer function of the self-adaptive filter is self-adaptively adjusted through the processor, so that the reverse cancellation signal and the environmental noise are equal in numerical value and opposite in direction, and are just cancelled. Therefore, the human ears can not hear the environmental noise, and the user can quickly enter the sleep state even in a noisy environment, thereby ensuring the sleep quality.
Description
Technical Field
The embodiment of the utility model provides a relate to acoustics technical field, concretely relates to pillow of making an uproar falls in feedback formula.
Background
The traditional pillow mainly provides a comfortable neck support for people to rest on the pillow. However, as the living pressure of people is continuously increased, the sleep quality is worse and worse, and the sleep is difficult to go to the common trouble of most people. Particularly, when the external environment is noisy, the difficulty of the insomnia people entering the sleep state is increased. However, the conventional pillow cannot provide more help to us.
Therefore, how to ensure that people can quickly enter a sleep state even in a noisy environment becomes a technical problem to be solved urgently in the application.
Disclosure of Invention
Therefore, the embodiment of the utility model provides a pillow of making an uproar falls in feedback formula to solve traditional pillow and can't realize that the user is in when noisy environment, let the user get into the sleep fast, and then guarantee the problem of sleep quality.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
according to the utility model discloses an aspect provides a pillow of making an uproar falls in feedback formula, and this pillow of making an uproar falls in feedback formula includes: the pillow comprises a pillow body, a microphone and a processor, wherein the microphone is arranged on the upper surface of the pillow; the microphone is electrically connected with the processor;
the microphone is used for collecting a noise signal, and the noise signal comprises environmental noise;
the processor is used for carrying out self-adaptive filtering processing on the environmental noise to obtain a reverse cancellation signal;
and adjusting the transfer function of the adaptive filter according to the environmental noise and the reverse cancellation signal until the noise heard by the human ear is zero, wherein the noise heard by the human ear comprises the reverse cancellation signal and the signal transmitted to the back of the human ear by the environmental noise.
Furthermore, the feedback type noise reduction pillow also comprises a loudspeaker, the loudspeaker is positioned in the pillow body, the sounding surface faces the surface of the pillow, and the loudspeaker is electrically connected with the processor; the loudspeaker is used for emitting reverse cancellation noise;
the microphone is also used for collecting reverse offset noise;
the processor is further configured to pre-process the noise signal according to the pre-acquired first transfer function, remove the reverse cancellation signal, and acquire the environmental noise.
Further, the loudspeaker is also used for emitting a first reference signal;
the microphone is also used for collecting the first reference signal to obtain a second reference signal when the loudspeaker sends the first reference signal;
the processor is further configured to determine a first transfer function based on the first reference signal and the second reference signal.
Further, the processor is specifically configured to obtain noise heard by the human ear by using a virtual sensing algorithm according to the environmental noise and the reverse cancellation signal;
and adjusting the transfer function of the adaptive filter by using the noise heard by the human ear until the noise heard by the human ear is zero.
Further, the processor is specifically configured to calculate, by using a virtual sensing algorithm, a second transfer function according to the second reference signal and a third signal acquired by the artificial head-ear microphone;
and acquiring the noise heard by the human ear according to the reverse cancellation signal, the second transfer function and the environmental noise.
Furthermore, the number of the loudspeakers and the number of the microphones are at least two, the pillow body is evenly divided into a left side and a right side, and each side is respectively provided with at least one loudspeaker and at least one microphone.
Further, when the noise signal includes environmental noise and reverse cancellation noise, and the environmental noise includes external environmental noise and noise emitted by a person, the processor is further configured to cancel the reverse cancellation noise by using an echo cancellation algorithm;
separating noise emitted by a person and external environment noise according to phase differences of signals collected by different microphones by using a signal blind source separation method;
the sleep quality and snoring of a person are monitored based on the noise emitted by the person.
Further, the processor is also used for analyzing the amplitude, the frequency spectrum and the time domain characteristics of the external environment noise and judging the external environment;
and according to the judgment result, selecting a sound signal for assisting sleep corresponding to the judgment result from a pre-established sound library, and sending the sound signal through a loudspeaker.
Further, the pillow body includes: the first area is formed by integrally-molded high-density sponge and is used for bearing a loudspeaker and a microphone; the second area is an adjustable supporting area and is used for supporting and fixing the neck of a user; a third region, which is a flexible support region, for supporting the head of a user; and the fourth area is composed of high-density sponge and is used for supporting the whole frame of the pillow.
The embodiment of the utility model provides a have following advantage: noise signals are collected using a microphone inside the pillow. Wherein the noise signal comprises ambient noise. The processor performs adaptive filtering processing on the environmental noise to acquire a reverse cancellation signal; and then, according to the environmental noise and the reverse cancellation signal, the transfer function of the adaptive filter is adjusted until the noise heard by the human ear is zero. Stated another way, it can be understood that the transfer function of the adaptive filter is adaptively adjusted by the processor, so that the reverse cancellation signal and the ambient noise are equal in value and opposite in direction, and are exactly cancelled. Therefore, the human ears can not hear the environmental noise, and the user can quickly enter the sleep state even in a noisy environment, thereby ensuring the sleep quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic structural view of a feedback noise reduction pillow provided in embodiment 1 of the present invention.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment 1 of the utility model provides a pillow of making an uproar falls in feedback formula, specifically as shown in figure 1, this pillow of making an uproar falls in feedback formula includes: the pillow comprises a pillow body 10, a microphone 101 and a processor 102, wherein the microphone 101 is arranged on the upper surface of the pillow; the microphone 101 is electrically connected with the processor 102; the processor 102 can be located within the pillow body 10 or can be located outside the pillow body 10. The processor 102 is shown in fig. 1 as being located within the pillow body 10.
The microphone 101 is used for collecting a noise signal, and the noise signal comprises environmental noise;
the processor 102 is configured to perform adaptive filtering processing on the environmental noise to obtain a reverse cancellation signal;
and adjusting the transfer function of the adaptive filter according to the environmental noise and the reverse cancellation signal until the noise heard by the human ear is zero, wherein the noise heard by the human ear comprises the reverse cancellation signal and the signal transmitted to the back of the human ear by the environmental noise.
Optionally, the feedback noise reduction pillow further comprises a speaker 103, the speaker 103 is located in the pillow body 10, the sound production surface faces the pillow surface, and the speaker 103 and the processor 102 are electrically connected; the speaker 103 is used for emitting reverse cancellation noise;
the microphone 101 is also used for collecting reverse cancellation noise;
the processor 102 is further configured to pre-process the noise signal according to the pre-acquired first transfer function, remove the reverse cancellation signal, and acquire the environmental noise.
Optionally, the speaker 103 is further configured to emit a first reference signal;
the microphone 101 is further configured to, when the speaker 103 sends out a first reference signal, acquire the first reference signal and obtain a second reference signal;
the processor 102 is further configured to determine a first transfer function based on the first reference signal and the second reference signal.
Optionally, the processor 102 is specifically configured to obtain noise heard by the human ear by using a virtual sensing algorithm according to the environmental noise and the reverse cancellation signal;
and adjusting the transfer function of the adaptive filter by using the noise heard by the human ear until the noise heard by the human ear is zero.
Optionally, the processor 102 is specifically configured to calculate, by using a virtual sensing algorithm, a second transfer function according to the second reference signal and a third signal acquired by the artificial head-ear microphone 101;
and acquiring the noise heard by the human ear according to the reverse cancellation signal, the second transfer function and the environmental noise.
Optionally, the number of the speakers 103 and the number of the microphones 101 are at least two, the pillow body 10 is equally divided into a left side and a right side, and at least one speaker 103 and at least one microphone 101 are respectively installed on each side.
Optionally, when the noise signal includes environmental noise and reverse cancellation noise, where the environmental noise includes external environmental noise and noise emitted by a person, the processor 102 is further configured to eliminate the reverse cancellation noise by using an echo cancellation algorithm;
separating noise emitted by a person and external environment noise according to the phase difference of signals collected by different microphones 101 by using a signal blind source separation method;
the sleep quality and snoring of a person are monitored based on the noise emitted by the person.
Optionally, the processor 102 is further configured to analyze an amplitude, a frequency spectrum, and a time domain characteristic of the external environment noise, and determine the external environment;
according to the judgment result, the sound signal for assisting sleep corresponding to the judgment result is selected from the pre-established sound library and is emitted through the loudspeaker 103.
Optionally, the pillow body 10 includes: a first area, which is formed by integrally molding high-density sponge and is used for bearing the loudspeaker 103 and the microphone 101; the second area is an adjustable supporting area and is used for supporting and fixing the neck of a user; a third region, which is a flexible support region, for supporting the head of a user; and the fourth area is composed of high-density sponge and is used for supporting the whole frame of the pillow.
In the following, a detailed working principle of the feedback noise reduction pillow mentioned in the present application to eliminate noise signals and improve the sleep quality of a user will be described. The method comprises the following specific steps:
when the microphone 101 collects a noise signal, in an ideal state, it is assumed that the noise signal includes only ambient noise. Then, the processor 102 is configured to perform an adaptive filtering process on the environmental noise, and preferably, a horizontal control filter is used to perform the filtering process to obtain the reverse cancellation signal. And then, according to the environmental noise signal and the reverse cancellation signal, the transfer function of the horizontal control filter is adjusted by using a self-adaptive filtering algorithm until the reverse cancellation signal and the environmental noise are equal in magnitude and opposite in direction, and then are cancelled, so that the noise heard by human ears is 0, namely no noise exists.
In particular implementations, the feedback noise reduction pillow can also include a speaker 103. Processor 102, after generating the reverse cancellation noise, emits it through speaker 103. The microphone 101 actually collects the reverse cancellation noise when collecting the ambient noise. In the acquisition process, the first transfer function is involved. This first transfer function may be calculated in advance.
The specific calculation process comprises the following steps:
the first reference signal is emitted by the loudspeaker 103, propagated to the microphone 101 and collected by the microphone 101, and then the second reference signal is acquired. The processor 102 may then calculate the first transfer function based on the first reference signal and the second reference signal. The first reference signal and the second reference signal are both known reference signals. The specific calculation method is a least mean square algorithm, and the calculation process is the prior art and is not described too much here.
In addition, in order to simulate the process that the reverse cancellation signal sent by the loudspeaker 103 is transmitted to the human ear and collected by the human ear, the process can also be simulated by an artificial head, and the ear part of the artificial head is provided with a microphone 101. For better illustration, the above-mentioned microphone 101 mounted in a pillow is defined herein for the time being as a first type microphone 101, and the ear microphone 101 mounted on an artificial head is defined herein as a second type microphone 101. Then, there is a certain mapping relationship between the noise collected by the first type microphone 101 and the noise signal collected by the second type microphone 101.
The mapping relationship may be solved by a virtual sensing algorithm. The specific calculation process is as follows: the artificial head is placed on the pillow according to the normal sleeping posture of a person, and after the loudspeaker 103 sends out the first reference signal, the second reference signal collected by the first microphone 101 and the third reference signal collected by the second microphone 101 are determined. A second transfer function between the second reference signal and the third reference signal is determined using a virtual sensing algorithm. Then, the noise heard by the human ear is obtained according to the reverse cancellation signal, the second transfer function and the ambient noise. The purpose of the present application is to make the noise heard by the human ear zero, and it is necessary to cancel the sound signal transmitted to the back of the human ear by the reverse cancellation noise and the environmental noise collected by the first type microphone 101, that is, to superpose the noise to zero. Then, the transfer function of the adaptive filter needs to be adjusted, and in particular, the adaptive algorithm may be used for adjustment. For example, a Least Mean Square (LMS) algorithm is used.
Optionally, when there is a reverse cancellation signal component in the noise signal, the processor 102 further includes, before processing the noise signal: and preprocessing the noise signal according to the pre-acquired first transfer function, removing reverse cancellation signal components, and acquiring an environment noise signal. Then, the environmental noise signal is subjected to adaptive filtering processing by utilizing the adjusted transfer function of the adaptive filter to obtain a new reverse cancellation signal. Until the reverse cancellation signal and the environmental noise signal are equal in magnitude and opposite in direction. That is, the signal collected by the microphone 101 is 0, and at this time, there is a functional relationship between the noise signal collected by the microphone 101 and the noise signal collected by the human ear, and when the signal collected by the microphone 101 is 0, the noise signal collected by the human ear is naturally also 0.
Alternatively, the human ear comprises a left ear and a right ear. Considering the errors of the left and right ears, the pillow body 10 can be equally divided into the left and right sides, each of which is provided with at least one speaker 103 and at least one microphone 101, respectively. That is, the number of speakers 103 and microphones 101 is at least two. The speaker 103 and microphone 101 on each side are used to perform the functions described above. It should be noted that the speaker 103 and the microphone 101 on each side have identification information corresponding to themselves, and are used for the processor 102 to distinguish, and further adjust the transfer function of the adaptive filter on the side corresponding to the data collected on the different sides.
Further optionally, the processor 102 is further configured to back up a noise signal when the noise signal includes ambient noise and reverse cancellation noise, and the ambient noise includes ambient noise and noise emitted by a person. Then, eliminating reverse offset noise by using an echo cancellation algorithm;
separating noise emitted by a person and external environment noise according to the phase difference of signals collected by different microphones 101 by using a signal blind source separation method; the sleep quality and snoring of a person are monitored based on the noise emitted by the person. That is, by monitoring the noise emitted by a person, the sleep quality of the user is determined, and snoring is monitored.
In addition, ideally, there is no residual noise and all noise can be cancelled out. However, in practical applications, it is likely that a small amount of residual noise will still exist in the noise cancellation process implemented by the above method. Thus, the method further comprises: analyzing the amplitude, frequency spectrum and time domain characteristics of the external environment noise, and judging the external environment; according to the judgment result, the sound signal for assisting sleep corresponding to the judgment result is selected from the pre-established sound library and is emitted through the loudspeaker 103. Through the mode, the user is assisted to enter the sleep state, and the sleep quality of the user is further ensured.
Optionally, the pillow body 10 includes: a first area, which is formed by integrally molding high-density sponge and is used for bearing the loudspeaker 103 and the microphone 101; the second area is an adjustable supporting area and is used for supporting and fixing the neck of a user; a third region, which is a flexible support region, for supporting the head of a user; and a fourth area composed of high-density sponge for supporting the whole frame of the pillow, wherein the first area to the fourth area are not schematically shown in fig. 1.
The embodiment of the utility model provides a pillow of making an uproar falls in reaction type utilizes the inside microphone 101 of pillow to gather noise signal. Wherein the noise signal comprises ambient noise. The processor 102 performs adaptive filtering processing on the environmental noise to obtain a reverse cancellation signal; and then, according to the environmental noise and the reverse cancellation signal, the transfer function of the adaptive filter is adjusted until the noise heard by the human ear is zero. Stated another way, it can be understood that the transfer function of the adaptive filter is adaptively adjusted by the processor 102 so that the reverse cancellation signal and the ambient noise are equal in value and opposite in direction, and are exactly cancelled. Therefore, the human ears can not hear the environmental noise, and the user can quickly enter the sleep state even in a noisy environment, thereby ensuring the sleep quality.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (2)
1. A feedback noise reduction pillow, comprising: the pillow comprises a pillow body, a microphone and a processor, wherein the microphone is mounted on the upper surface of the pillow; the microphone is electrically connected with the processor;
the microphone is used for collecting a noise signal, and the noise signal comprises environmental noise;
the processor is used for carrying out self-adaptive filtering processing on the environmental noise to obtain a reverse cancellation signal;
and adjusting the transfer function of the adaptive filter according to the environmental noise and the reverse cancellation signal until the noise heard by the human ear is zero, wherein the noise heard by the human ear comprises the reverse cancellation signal and the signal transmitted to the back of the human ear by the environmental noise.
2. The feedback noise reduction pillow of claim 1 wherein the pillow body comprises: the first area is formed by integrally-molded high-density sponge and is used for bearing a loudspeaker and a microphone; the second area is an adjustable supporting area and is used for supporting and fixing the neck of a user; a third region, which is a flexible support region, for supporting the head of a user; and the fourth area is composed of high-density sponge and is used for supporting the whole frame of the pillow.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920546069.2U CN210227657U (en) | 2019-04-19 | 2019-04-19 | Feedback type noise reduction pillow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920546069.2U CN210227657U (en) | 2019-04-19 | 2019-04-19 | Feedback type noise reduction pillow |
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| CN210227657U true CN210227657U (en) | 2020-04-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109864515A (en) * | 2019-04-19 | 2019-06-11 | 西安凌软创新电子科技有限公司 | A kind of reaction type noise reduction pillow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109864515A (en) * | 2019-04-19 | 2019-06-11 | 西安凌软创新电子科技有限公司 | A kind of reaction type noise reduction pillow |
| CN109864515B (en) * | 2019-04-19 | 2024-03-29 | 西安凌软创新电子科技有限公司 | Feedback type noise reduction pillow |
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