When we got back, I noticed a loud, high-pitched noise. It sounded like gas or steam escaping under pressure from the basement.
就在我们返回到住处的时候，我听到一种尖锐的噪声，这种噪声听上去像是来自地下室的受压气体或蒸汽的声音。
A high pitched squeaky noise doesn't do it the force of the high frequency sound wave does.
像“叽吱”（划玻璃）一样的高音调的噪音就做不到震碎玻璃，而高频率的音波却可以做到。
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