I am not a musician, I don't read music and I don't actually play any instruments. However (and sorry if this sounds stupid) I'm a very good dancer and believe I have a good ear and feeling for tempo and beat.
However, when I listen to certain songs, I notice that there is a beat/tempo that changes the moment another instrument joins in, or the vocalist starts to sing.
The two pieces of music I notice this on all of the time is the intro to 'All my life' by the Foo Fighters and the change over from the verse into the chorus section of 'Forever came today' by Diana Ross and the Supremes.
I have no idea how to describe it correctly (hence my posting here) but in the Diana Ross song, I can only describe it as a slow beat that doesn't change tempo as it goes into the chorus, but it suddenly sounds as though the tempo goes to the same speed as 'Can't hurry love' (also by Diana Ross (or Phil Collins)).
I'm not really expecting anything from the query, but it just sits in the back of my mind and somebody may also think about it, but know what it's called (if anything).
Thanks in advance,