Discrete type active noise-reducing, ventilating and sound-insulating window

Abstract

The invention discloses a discrete type active noise-reducing, ventilating and sound-insulating window structure. A window body is divided into an inner layer and an outer layer, each layer of the window consists of a casement window and a middle fixed window, and the fixed window can be divided into a plurality of discrete type active noise-control pipelines according to a noise-reducing requirement; a control system comprises a plurality of controllers, a plurality of reference microphones, a plurality of control sources and a plurality of error microphones; and the control sources are arranged in middle interlayer of each discrete type pipeline near to an indoor air vent, the reference microphones are arranged at each discrete type pipeline opening in the window which is near to an outdoor wind inlet, and the error microphones are arranged on a window frame which is near to the indoor air vent. The window can obtain 12dBA of newly-increased noise attenuation quantity under 200-800Hz while natural ventilating, so that the afference of the low-frequency noise of wideband can be effectively attenuated. Meanwhile, the frequency upper limit can be controlled according to the requirement of the family life, and the number of the discrete type pipelines can be increased, so that the frequency band can be effectively controlled under the condition that the natural ventilation is further improved. Various work statuses can be provided to meet the requirements of the family life.

Description

1. Technical field [0001] The invention relates to a design method of a noise-reducing ventilation and sound-insulation window using a discrete active noise control technology, in particular to a discrete active control technology for a noise-reducing ventilation and sound-insulation window. 2. Background technology [0002] With the further advancement of urbanization, urban noise pollution is becoming more and more serious, seriously affecting people's physical and mental health. How to effectively avoid noise pollution in people's work, life and activity places is an extremely meaningful task. However, the existing methods are to avoid the further spread of noise by closing windows and other methods, which cannot be obtained from the building. Natural ventilation and closing the windows at the same time will further increase the dependence on the air conditioning and ventilation functions, which is not conducive to energy saving and environmental protection. Therefore, a...

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Problems solved by technology

[0005] Invention patents such as CN101220726, CN1482341, CN1702286 and CN171023 all describe the design methods of ventilation and sound insulation windows, all of which use passive noise reduction methods to attenuate the introduction of noise while ventilating, and the incoming noise with the airflow Limited attenuation of noise, especially in lower frequency bands

CN101881119A discloses an active noise-reducing sliding window structure that can effectively attenuate noise, especially low-frequency broadband noise, wh

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