An intelligent noise reduction method for a range hood

Abstract

The invention relates to an intelligent noise reduction method for a range hood, which is characterized in that: Step 1, collecting real-time sound signals during the operation of the range hood, if the sound signal contains a person, enter step 2; step 2, obtain the user's sound pressure value and The sound pressure value of the background noise; step 3, if the sound pressure value of the user minus the sound pressure value of the background noise is less than or equal to the preset threshold, go to step 4; step 4, detect the resistance in the flue connected to the exhaust port of the range hood and the firepower of the cooker , if the resistance in the flue is less than or equal to the preset resistance threshold, and the firepower of the stove is less than or equal to the preset firepower threshold, go to step 5; step 5, reduce the range hood fan speed, and return to step 1 after a preset time delay. Compared with the prior art, the present invention can satisfy the user's demand on the oil smoke performance of the range hood under the condition of improving the user's dialogue quality.

Description

technical field

[0001] The invention relates to an intelligent noise reduction method for a range hood. Background technique

[0002] Existing range hoods are generally noisy, and the national standard stipulates that the A-class sound power level is 72dB (A). However, under this noise standard, it still affects the user's call quality in the kitchen. Many users report that they cannot communicate happily with others while cooking in the kitchen. The reason is that the kitchen is noisy, which affects the quality of calls between family members. With the improvement of users' requirements for the quality of life, the requirements for kitchen noise are becoming more and more stringent.

[0003] Existing range hoods adapted to user scenarios have the following disadvantages in noise reduction processing:

[0004] 1. When using the range hood, due to the high noise, the user may not be able to hear the other party's speech clearly when talking in the kitchen.

[0005] 2. The...

Examples

Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Such as figure 1 The intelligent noise reduction method for range hood comprises the steps of:

[0020] Step 1. Collect real-time sound signals during the operation of the range hood. If the collected real-time sound signals contain human sound signals, go to step 2. If there are no human sound signals in the collected real-time sound signals, the fumes The machine operates normally according to the current state; since the sound frequency of the human voice is different from the sound frequency of the fan when the range hood is running, the sound pressure value of the user's voice and the sound pressure value of the background noise can be extracted respectively through filtering and Fourier transform , the background noise signal in the range of 80-1200hz is filtered out during the filtering process here, if the detected sound pressu...

technical field

[0001] The invention relates to an intelligent noise reduction method for a range hood. Background technique

[0002] Existing range hoods are generally noisy, and the national standard stipulates that the A-class sound power level is 72dB (A). However, under this noise standard, it still affects the user's call quality in the kitchen. Many users report that they cannot communicate happily with others while cooking in the kitchen. The reason is that the kitchen is noisy, which affects the quality of calls between family members. With the improvement of users' requirements for the quality of life, the requirements for kitchen noise are becoming more and more stringent.

[0003] Existing range hoods adapted to user scenarios have the following disadvantages in noise reduction processing:

[0004] 1. When using the range hood, due to the high noise, the user may not be able to hear the other party's speech clearly when talking in the kitchen.

[0005] 2. The...

Examples

Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Such as figure 1 The intelligent noise reduction method for range hood comprises the steps of:

[0020] Step 1. Collect real-time sound signals during the operation of the range hood. If the collected real-time sound signals contain human sound signals, go to step 2. If there are no human sound signals in the collected real-time sound signals, the fumes The machine operates normally according to the current state; since the sound frequency of the human voice is different from the sound frequency of the fan when the range hood is running, the sound pressure value of the user's voice and the sound pressure value of the background noise can be extracted respectively through filtering and Fourier transform , the background noise signal in the range of 80-1200hz is filtered out during the filtering process here, if the detected sound pressu...

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