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Passive noise reduction technology is not enough to improve the acoustic comfort of the indoor acoustic environment. This paper discusses the application prospects of active noise control technology in the indoor acoustic environment, studies the principle and development status of active noise control technology, describes the determinants of the effect about the active noise control and the application prospects in the indoor acoustic environment, and points out the current problems to be solved in the research and future research directions.

Abstract. Due to the poor transport system, remoteness and few channels to access to information from the outside world in most minority-inhabited areas in China, buildings in these areas are well preserved. In particular, dwellings in these places show low-tech and ecological features. Different types and the natural environment of the plateau where Shangri-La lies provide people with a variety of living resources. As living environments vary in different areas, different inhabitation forms have been formed. Tibetan people adjust measures to local conditions and excel at using local materials and appropriate technologies to build houses. In this paper, a case study is made of traditional dwellings in Tibetan-inhabited areas in Shangri-La, to analyze lowtech and ecological strategies for traditional dwellings in Tibetan-inhabited areas in Shangri-La, from three aspects: regional environment measures, building technologies and the spatial order system.