但是，目前市面上的自动声反馈抑制产品，大多是国外品牌，价格不菲。
However, most of automatic feedback suppressors in domestic market are imported from oversea and expensive.
本文叙述抑制声反馈的频移器的设计，并进行了实验研究。
This paper describes the design of a frequency shifter to suppress acoustic feedback, to be studied by the experimental method.
如何合理有效地抑制声反馈，提高扩声系统增益是衡量扩声系统性能的重要依据。
How to reduce acoustic feedback and enhance the maximum usable gain of sound reinforcement system is one of the most important terms to evaluate the performance of the sound reinforcement system.
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