Active noise-reducing ventilating sound-proof sliding window

Abstract

The invention discloses an active noise-reducing sliding window structure, which is naturally ventilative, can effectively attenuate noise, and particularly reduces low-frequency broadband noise. The window body is a two-layer horizontal sliding window; and an active noise control system comprise a controller, a reference microphone sequence, a control source sequence and an error microphone sequence, wherein the controller adopts feedforward adaptive control and is arranged in a device case on the lower part of the sliding window; the control source sequence is arranged in device cases of upper and lower parts of the sliding window and a control source bracket in the middle of a sandwich of the double-layer window; and the reference microphone sequence and the error microphone sequence are respectively arranged in vertical window frames of the inner side and the outer side of the window and are communicate with the external air. Three working conditions are preset, namely an enclosed sound-proof condition under the condition of the totally enclosed window (the active noise control system does not work), a ventilative active noise-reducing condition that the a reference microphone side sash opening area of the outer-side window is less than 50 percent of the total opening area and an error microphone side sash opening area of the inner-side window is less than 50 percent of the total opening area (the active noise control system works), and a free ventilative condition in other window opening modes (the active noise control system does not work). The active noise-reducing sliding window structure can achieve the newly increased noise attenuation of over 6dB in a frequency range of 200 to 600Hz.

Description

technical field [0001] The invention relates to a design method of a ventilation and airtight sliding window using active noise control technology. Background technique [0002] Advocating green buildings is an inevitable trend of energy saving, healthy life and harmonious ecology. One of the important elements is the natural ventilation of the building. However, opening windows for ventilation can cause noise problems, such as outdoor traffic noise polluting the living environment. A window system that is naturally ventilated but has sufficient attenuation capacity for the incoming noise from the outside is important and meaningful. [0003] There have been related studies abroad, British scholars [J.Kang, Zhemin Li, "Numerical simulation of anacoustic window system using finite element method," Acust.Acta Acust.Volume 93, 152-163 (2007); J.Kang, M.W.Brocklesby , "Feasibility of applying micro-perforated absorbents in acoustic window systems," Appl. Acoust. Volume 66, 66...

AI Technical Summary

Problems solved by technology

The design methods of these published ventilation and sound insulation windows in China all use passive noise reduction methods to attenuate the incoming noise while ventilating, and have limited attenuation ability for the noise introduced with the airflow, especially the noise in the lower frequency band.

[0005] In the prior art, there is no actual window system capable of natural ventilation and effective active (active) control of the introduction of outdoor broadband noise

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