"It is based on acoustics and temperature, so it basically picks up the noise of the water as it runs through the pipe, " Dr Hendrickx explained.
它的工作原理基于声音和温度，总体上是采集水流过水管时的杂音，同时也记录下温度的变化。
2
Dr Hendrickx acknowledged that the survey was not representative of the entire nation, but added that there were plans to conduct more surveys in the future.
亨德里克斯博士承认，这项调查并不能代表全国的整体状况，但已有在今后举办更多此类调查的计划。
3
Previously, data on showering behaviour had been collated by asking households to complete questionnaires. But this approach had a number of drawbacks, Dr Hendrickx explained.