TW202011750A - Indoor active noise reduction system and method - Google Patents

Abstract

An indoor active noise reduction system and method, the system includes a disturbance sensor, an acoustic wave generator, and a processing host. The method includes the following steps: the disturbance sensor senses the disturbance generated by the user's mouth and nose; generate a sensing signal when the disturbance intensity sensed by the disturbance sensor is greater than a predetermined threshold, the processing host drives the acoustic wave generator to generate a noise reduction wave due to the triggering of the sensing signal, and reduce the noise generated by the user.

Description

Indoor active noise reduction system and method

The invention relates to an indoor active noise reduction system and method, and in particular to an indoor active noise reduction system and method with noise induction and automatic start functions.

Modern people are increasingly demanding the sound quality of the indoor environment, especially in some special occasions, such as classical concerts or lectures, need to keep the scene quiet. However, due to the uncontrollable physical conditions of the listeners, such as the noises from coughing or sneezing, the tranquility of the scene is affected. However, no effective equipment has been developed to eliminate this problem.

The purpose of the present invention is to provide an indoor active noise reduction system and method for actively eliminating the noise emitted by coughing or sneezing. The system in this case may include: a perturbation sensor, which is close to a user and used for sensing A disturbance signal from the nose and mouth generates a sensing signal; an acoustic wave generator; and a processing host, the signal is connected to the disturbance sensor and the acoustic wave generator, the processing host is driven by the trigger of the sensing signal The sound wave generator generates a noise-reducing wave to reduce the noise emitted by the user's mouth and nose.

The indoor active noise reduction system according to the preferred embodiment of the present invention, wherein the disturbance sensor includes a sound sensor for sensing that the noise intensity emitted by the user's mouth and nose is greater than a preset threshold and immediately A sensing signal is generated and transmitted to the processing host. The processing host drives the sound wave generator to generate the noise reduction wave in response to the trigger of the sensing signal. The noise reduction wave is an inverted sound wave that simulates the noise sound wave emitted by the user The waveform data of the noise reduction wave is pre-stored in a sound wave database of the processing host.

The indoor active noise reduction system according to the preferred embodiment of the present invention, wherein the sound sensor is integrated in a snout appliance and has a start switch, the start switch keeps the sound sensor in a normally closed state. When the user feels that he wants to cough or sneeze, the mouth and nose appliance is covered to the nose and nose and the activation switch is used to turn on the sound sensor.

According to the indoor active noise reduction system according to the preferred embodiment of the present invention, wherein the activation switch is a capacitive sensor provided at the mouth-nose contact of the mouth-nose appliance, when the user places the mouth-nose appliance on the mouth-nose When it is on, it senses a change in the coupling capacitance, and then automatically activates the sound sensor.

According to the indoor active noise reduction system according to the preferred embodiment of the present invention, the sensing signal carries a noise intensity information, and the noise intensity information is provided to the processing host for reference to determine whether the sound wave generator generates the noise Reduce the intensity of noise waves.

According to an indoor active noise reduction system according to a preferred embodiment of the present invention, the waveform data of noise reduction waves pre-stored in the sound wave database are multiple sets of noise reduction wave spectrum characteristic values, and each set of noise reduction wave spectrum characteristic values is used to Represents the spectral distribution characteristic of a noise-reducing wave, which is obtained by actually sampling different users.

The indoor active noise reduction system according to the preferred embodiment of the present invention, wherein the sound sensor is integrated in a snout appliance and has a wireless signal module for wirelessly transmitting the sensing signal to the processing Host.

According to an indoor active noise reduction system according to a preferred embodiment of the present invention, the disturbance sensor includes an air flu sensor for sensing the local change of the airflow at the user's mouth and nose signal.

According to a preferred embodiment of the present invention, the indoor active noise reduction system, wherein the disturbance sensor includes a sound sensor and a flu sensor, the sound sensor senses the intensity of noise emitted by the user's mouth and nose When the airflow sensor detects a local change in the airflow of the user's mouth and nose when the airflow sensor is greater than a preset threshold, the sensing signal is immediately generated and transmitted to the processing host.

According to the indoor active noise reduction system according to the preferred embodiment of the present invention, the mouth and nose appliance is disposable, and is detachable from the sound sensor and the activation switch.

Another aspect of the present invention is an indoor active noise reduction method, which includes the following steps: sensing a disturbance generated by a user's mouth and nose; generating a sensing signal and sending out the sensed disturbance intensity greater than a preset threshold; A noise reduction wave is generated due to the triggering of the sensing signal to reduce the noise emitted by the user's mouth and nose.

According to the indoor active noise reduction method according to a preferred embodiment of the present invention, the sensing signal carries a noise intensity information, and the noise intensity information is used to determine the intensity of the generated noise reduction wave.

According to the indoor active noise reduction method according to the preferred embodiment of the present invention, the disturbance generated in the user's mouth and nose includes local changes in the user's mouth and nose.

According to the indoor active noise reduction method according to a preferred embodiment of the present invention, the disturbance generated by the user's mouth and nose includes noise emitted by the user's mouth and nose.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, preferred embodiments are described below in conjunction with the accompanying drawings, which are described in detail below.

Some typical embodiments that can realize the features and advantages of the present invention will be described in detail in the subsequent description. It should be understood that the present invention can have various changes in different forms, which do not deviate from the scope of the technical solution of the present invention, and the description and drawings therein are essentially used for explanation, not for limitation. this invention.

Please refer to Figure 1, which is a functional block diagram of an indoor active noise reduction system developed in this case. The environment is illustrated by an indoor space 1 such as a concert hall, conference hall, or recording studio that requires quietness and no sound disturbance. The indoor space There are usually a number of seats in 1, and this figure is represented by seats 101 to 105. The user of this example sits in seat 101, and the performer or speaker is located on stage 11 in the distance. The system 2 in this case includes at least one disturbance sensor 21, a processing host 22 and an acoustic wave generator 23. The disturbance sensor 21 can be located on or near the seat 101 to approach the user sitting on the seat 101. The disturbance sensor 21 may include a sound sensor 210 and an air flu sensor 211, the sound sensor 210 is used to sense whether the intensity of noise emitted by the user's mouth and nose is greater than a preset threshold, and the air flu The detector 211 is used to sense whether the airflow at the mouth and nose of the user has a local change greater than a preset value. In one embodiment, the air flu sensor 211 can play the same role as the sound sensor 210 in the disturbance sensor 21, when either the sound sensor 210 and the air flu sensor 211 sense When the airflow to the user's mouth and nose changes or the noise intensity is greater than the preset threshold, a sensing signal can be immediately generated and transmitted to the processing host.

In another embodiment, the air flu detector 211 can be used as a wake-up mechanism in a power-saving state. For example, when the indoor active noise reduction system is in a state where most of the circuits are turned off, but the flu sensor 211 can be turned on and monitor the gas flow, when the user’s mouth and nose are part of the airflow When the change is greater than the preset value, it means that there may be a situation to occur, a wake-up signal can be generated to wake up the entire system, and the task of noise reduction is given to the sound sensor 210 in the disturbance sensor 21 to perform the following step.

Of course, in another embodiment, the disturbance sensor 21 may also include only the sound sensor 210 or only the air flu sensor 211, and the subsequent embodiments will take only the sound sensor as an example To explain.

The sound sensor can be a microphone or other sensing elements that can convert sound waves or related vibrations into electromagnetic signals. Therefore, the disturbance sensor 21 completed by the sound sensor 21 can be used to sense the user's mouth and nose The noise (mainly coughing or sneezing). When the disturbance sensor 21 senses noise (cough or sneeze), it immediately generates a sensing signal S. The processing host 22 is coupled to the disturbance sensor 21 by signal connection or direct electrical connection. The processing host 22 mainly drives the acoustic wave generator 23 to generate a signal due to the trigger of the sensing signal S. Noise-reducing wave. The waveform of noise-reducing wave is mainly the inverse of the cough or sneeze waveform. The purpose of noise-reducing wave is to superimpose the noise emitted by the user (mainly cough or sneeze) to eliminate it. The position of the sound wave generator 23 can also be set between the seat 101 and the distant stage 11 or even close to the stage 11 to eliminate the mouth and nose noise (cough or sneeze) originally transmitted to the stage 11. The details and different variations of the disturbance sensor 21, the processing host 22, and the acoustic wave generator 23 will be described below.

First, please refer to FIG. 2, which is a functional block diagram of a miniaturized sound sensor. The perturbation sensor 21 implemented by the sound sensor in the system of this case can be integrated into mouth and nose appliances 31 such as handkerchiefs or masks , And can additionally have an independent power supply 32, a wireless signal module 33 and a start switch 34 . The start switch 34 allows the disturbance sensor 21 to be normally turned off to avoid malfunction. When the user feels that he wants to cough or sneeze, the mouth and nose appliance 31 is covered to the mouth and nose and the activation switch 34 is pressed to turn on the disturbance sensor 21. In this way, when the disturbance sensor 21 is turned on, it can be used to sense whether the user emits noise whose volume intensity exceeds a preset threshold value, and if so, send the sensing signal S through the wireless signal module 33 To the processing host 22, the processing host 22 triggers the sound wave generator 23 to generate a noise reduction wave in response to the sensing signal S. The noise reduction wave is mainly a reverse phase sound wave that simulates the noise sound wave (cough sound wave or sneeze sound wave) emitted by the user, which is used to cancel and reduce the noise emitted by the user, and the waveform data of the noise reduction wave can be pre-stored in the processing host In the sound wave database 220 of 22, the waveform data of the noise reduction wave can be a general-purpose cough sound wave or a sneeze sound wave, and the user selects the type on the start switch 34 (for example, the first key is sneeze and the second key is cough). To emit the corresponding noise reduction wave. The sensing signal S here can be a simple trigger signal or a trigger signal with only noise intensity information, which can be provided to the processing host 22 for reference to determine whether the sound wave generator 23 generates the Reduce the intensity of noise waves.

In addition, the waveform data of the noise reduction wave pre-stored in the sound wave database 220 of the processing host 22 may be multiple sets of noise reduction wave spectrum characteristic values, and each group of noise reduction wave spectrum characteristic values is used to represent the spectral distribution characteristics of a corresponding noise reduction wave. As for the characteristic values of the noise-reducing wave spectrum corresponding to several basic types of coughing or sneezing, the actual sampling of different users can be pre-stored in the sound wave database 220 of the processing host 22, which is used to allow the processing host 22 to choose One set. The selection method may be to play to the user in advance to allow the user to manually select the sound type that sounds closer, or directly let the user cough or sneeze to directly sample to generate a noise-reduced spectrum characteristic value Then, it is stored in the sound wave database 220 of the processing host 22. The intensity of the noise reduction wave finally generated by the sound wave generator 23 can be adjusted according to the volume detected by the disturbance sensor 21.

In addition, the content of the sensing signal S generated by the disturbance sensor 21 according to the noise whose volume intensity exceeds the preset threshold value can also be a set of characteristic values of the noise-reduced wave spectrum actually sampled, which are directly transmitted to the processing host 22, so that The sound wave generator 23 can directly generate the corresponding noise reduction wave according to the set of noise reduction wave spectrum characteristic values. The miniaturized disturbance sensor 21 can be integrated into a handkerchief or a mask, and of course can be fixed near the headrest of the seat 101, the purpose of which is to approach the user's voice position. In addition to the physical key switch, the activation switch 34 may also be an activation switch completed by a touch sensor, for example, a capacitive sensor provided at the mouth-nose contact of the mouth-nose appliance 31 for use when When the mouth-nose appliance 31 is placed on the mouth-nose, the coupling capacitance can be sensed, and the disturbance sensor 21 can be automatically activated. Of course, the processing host 22 and the acoustic wave generator 23 can simultaneously process the disturbance sensors 21 on other seats near the seat 101, so the processing host 22 can correspond to multiple disturbance sensors 21 at the same time, and then drive the acoustic wave generator 23 to generate Multiple noise reduction waves.

Because the nose and mouth appliance 31 is susceptible to personal pollution, it can be designed to be disposable and form a detachable design with the disturbance sensor 21, the independent power supply 32, the wireless signal module 33, and the start switch 34. For example, the disturbance sensor 21, the independent power supply 32, the wireless signal module 33 and the start switch 34 are integrated on an electronic device 40, and the mouth and nose appliance 31 completed with a mask has a zipper bag 310 to place the electronic device 40 , Please refer to Figure 3 for related diagrams. These mouth and nose appliances 31 with integrated electronic devices can be placed at the door of the indoor space 1 that needs to be quiet and without sound disturbance, such as a concert hall, conference hall, or recording studio, so that people who need it can take it for themselves.

Please refer to Figure 4, which is a schematic diagram of the indoor active noise reduction method proposed in this case. First, a disturbance sensor can be used to sense the disturbance (noise or local changes in the airflow) issued by the user's mouth and nose (step 50) , The sound sensor determines whether the intensity of the disturbance detected is greater than a preset threshold (step 51), if not, it returns to step 50 to continue sensing. If so, it generates a sensing signal (step 52) and sends it to the processing host; the processing host generates a noise reduction wave (step 53) in response to the trigger of the sensing signal, which will reduce the noise emitted by the user's mouth and nose And, the sensing signal may carry a noise intensity information, and the noise intensity information is used to determine the intensity of the generated noise reduction wave.

Of course, the sound sensor, processing host, sound wave generator and other components in this case can be found on the corresponding hardware of the smartphone, so the above indoor active noise reduction method can be completed in the form of an application It is also installed on the smartphone. If necessary, the application can be executed on the smartphone, and the function of the indoor active noise reduction system can also be achieved. Therefore, this application can be placed in the cloud. It is used for downloading and installation for the audience entering the concert hall.

In summary, the present invention can provide an indoor active noise reduction device and method for further eliminating the effect of mouth and nose noise. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this skill can make some modifications and retouching without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be deemed as defined by the scope of the attached patent application.

101～105: seat 2: System 21: Disturbance sensor 210: sound sensor 211: gas flu detector 22: Processing host 23: Sound wave generator S: Sensing signal 11: Stage 31: Mouth and nose appliances 32: Independent power supply 33: wireless signal module 34: Start switch 220: Sonic database 310: Zipper bag 40: Electronic device

FIG. 1 is a functional block diagram of an indoor active noise reduction system developed in this case. FIG. 2 is a functional block diagram of a miniaturized sound sensor. FIG. 3 is a schematic view of the appearance of a mouth and nose appliance integrated with an electronic device developed in this case. FIG. 4 is a schematic flowchart of the indoor active noise reduction method proposed in this case.

101~105: seat

2: System

21: Disturbance sensor

210: sound sensor

211: gas flu detector

22: Processing host

23: Sound wave generator

S: Sensing signal

11: Stage

Claims (14)

An indoor active noise reduction system, which includes: a disturbance sensor, close to a user, for sensing a disturbance from the user's mouth and nose to generate a sensing signal; an acoustic wave generator; and a processing host, the signal Connected to the disturbance sensor and the acoustic wave generator, the processing host drives the acoustic wave generator to generate a noise reduction wave in response to the trigger of the sensing signal, so as to reduce the noise emitted by the user's mouth and nose. The indoor active noise reduction system as described in item 1 of the patent application scope, wherein the disturbance sensor includes a sound sensor for sensing that the intensity of noise emitted by the user's mouth and nose is greater than a preset threshold and immediately A sensing signal is generated and transmitted to the processing host. The processing host drives the sound wave generator to generate the noise reduction wave in response to the trigger of the sensing signal. The noise reduction wave is an inverted sound wave that simulates the noise sound wave emitted by the user The waveform data of the noise reduction wave is pre-stored in a sound wave database of the processing host. An indoor active noise reduction system as described in item 2 of the patent application scope, wherein the sound sensor is integrated in a snout appliance and has a start switch, which enables the sound sensor to be normally in a closed state when the When the user feels that he wants to cough or sneeze, the mouth and nose appliance is covered to the nose and nose and the activation switch is used to turn on the sound sensor. An indoor active noise reduction system as described in item 3 of the patent application scope, wherein the activation switch is a capacitive sensor provided at the mouth-nose contact of the mouth-nose appliance, when the user places the mouth-nose appliance on the mouth-nose When it is on, it senses a change in the coupling capacitance, and then automatically activates the sound sensor. The indoor active noise reduction system as described in item 2 of the patent application scope, wherein the sensing signal carries a noise intensity information, and the noise intensity information is provided to the processing host for reference to determine whether the sound wave generator generates the noise Reduce the intensity of noise waves. The indoor active noise reduction system as described in item 2 of the patent application scope, wherein the waveform data of noise reduction waves pre-stored in the sound wave database are multiple sets of noise reduction wave spectrum characteristic values, and each set of noise reduction wave spectrum characteristic values is used to Represents the spectral distribution characteristic of a noise-reducing wave, which is obtained by actually sampling different users. The indoor active noise reduction system as described in item 2 of the patent application scope, wherein the sound sensor is integrated in a snout appliance and has a wireless signal module for wirelessly transmitting the sensing signal to the processing Host. An indoor active noise reduction system as described in item 1 of the patent application scope, wherein the disturbance sensor includes an air flu sensor for sensing local changes in the airflow at the user's mouth and nose signal. The indoor active noise reduction system as described in item 1 of the patent application scope, wherein the disturbance sensor includes a sound sensor and an air flu sensor, and the sound sensor senses the noise intensity emitted by the user's mouth and nose When the airflow sensor detects a local change in the airflow of the user's mouth and nose when the airflow sensor is greater than a preset threshold, the sensing signal is immediately generated and transmitted to the processing host. The indoor active noise reduction system as described in item 1 of the patent application scope, wherein the mouth and nose appliance is disposable, and is detachable from the sound sensor and the activation switch. An indoor active noise reduction method, which includes the following steps: 　　sensing a disturbance generated by a user's mouth and nose; A noise reduction wave is generated to reduce the noise emitted by the user's mouth and nose. The indoor active noise reduction method as described in item 11 of the patent application range, wherein the sensing signal carries a noise intensity information, and the noise intensity information is used to determine the intensity of the generated noise reduction wave. The indoor active noise reduction method as described in item 11 of the patent application scope, wherein the disturbance generated by the user's mouth and nose includes local changes in the user's mouth and nose. The indoor active noise reduction method as described in item 11 of the patent application scope, wherein the disturbance generated by the user's mouth and nose includes the noise emitted by the user's mouth and nose.

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