The bass drum and the tuba or in the marching band, it would be a sousaphone they would call it, the bass drum and tuba.

该是低音鼓和低音号,军乐队中,该是他们所说的苏萨大号,低音鼓和低音号

耶鲁公开课 - 聆听音乐课程节选

Our brain has got all that stuff coming in there and we're probably focusing a lot on the bass and "Boom, boom, " the tuba that's playing there.

我们的大脑收集了所有听到的信息,而且可能更专注与低音部分,以及大号发出的"邦 邦"声

耶鲁公开课 - 聆听音乐课程节选