名词
中文翻译：降噪
同义词：
['noise reduction', 'soundproofing', 'muffler']
例句：
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1. The engineer designed a noise-deadening material to reduce the noise pollution in the factory.
工程师设计了一种降噪材料，以减少工厂的噪音污染。
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2. The new car has a noise-deadening system that helps to reduce road noise.
这款新车配备了一种降噪系统，有助于减少道路噪音。
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3. The construction workers used noise-deadening materials to protect the workers from the noisy environment.
建筑工人使用降噪材料来保护工人免受嘈杂环境的影响。