Noise control device, electrical equipment and noise control method of electrical equipment

Abstract

The invention discloses a noise control device, electrical equipment and a noise control method of the electrical equipment, wherein the device comprises a first collection unit, an active noise reduction unit and a second collection unit; the first collection unit acquires a first noise signal transmitted by the electrical equipment, and takes a sound field where the first noise signal is locatedas a primary sound field; the active noise reduction unit generates a second noise signal according to the first noise signal sent by the electrical equipment, and takes a sound field where the second noise signal is located as a secondary sound field; the primary sound field and the secondary sound field are controlled to be superposed; the second acquisition unit acquires an error noise signalgenerated by superposing the primary sound field and the secondary sound field; the active noise reduction unit is also used for adjusting the secondary sound field according to an error noise signalgenerated by superposing the primary sound field and the secondary sound field; and the primary sound field and the adjusted secondary sound field are controlled to be superposed. According to the scheme, the problem that the noise reduction effect is poor due to the fact that the noise reduction frequency band cannot be expanded in the active noise reduction mode of the electrical equipment can be solved, and the effect of improving the noise reduction effect of the electrical equipment is achieved.

Description

technical field [0001] The invention belongs to the technical field of household appliances, and in particular relates to a noise control device, electrical equipment (especially a range hood) and a noise control method thereof, in particular to an active noise reduction control device for a range hood, a range hood and its active noise reduction control method. Background technique [0002] Noise pollution is an environmental problem that is of great concern to the whole world. General noise interference will affect people's normal work and life. Living in a high-noise environment for a long time will cause serious harm to people's hearing and physical and mental health. Traditional noise control technologies can include sound absorption treatment, sound insulation treatment, use of mufflers, vibration isolation, damping and shock absorption, etc., which are called "passive" noise control. However, the passive noise control method is more effective for medium and high freq...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a noise control device, electrical equipment and its noise control method to solve the problem that the active noise reduction method for electrical equipment cannot expand the noise reduction frequency range and the noise reduction effect is not good. , to achieve the effect of improving the noise reduction effect on electrical equipment

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