Air flowing through the shell or cup has also been suggested as a possible cause, but experiments in soundproof rooms have disproved this.
Air flowing through the shell or cup has also been suggested as a possible cause, but experiments in soundproof rooms have disproved this.
在贝壳或杯子里流动的空气，也被认为是产生声音的可能因素之一，然而在隔音的房间里所做的实验已将这个可能推翻。