If one wanders into the room and the radio is on, it is instantly apparent whether it is 'From Our Own Correspondent' or The Daily Service or The News or a drama or whatever. The words don't have to be clear - there is a particular type of voice for each. In the same way, is there a 'poetry voice' which (try as we might perhaps) most of us drop into?

And if there is, what is it like?

Can't pin it down either Dave but I think it goes up a bit! LOL
Win

There is a voice but it is different for everyone, and each person's 'poetry' voice is different from their normal voice. It is performance, pure and simple. In the same way we would speak differently to a binman than to a judge.

The voice we adopt (adopt is a good word because it can imply both conscious and unconscious decisions) is a frame for the work we are trying to express. To try and read 'naturally' is disingenuous - it is still a pose. You may notice that some people seem more relaxed when reading poetry in front of fifty people than when speaking to an individual, this proves the artifice of the 'natural performer'. These people are merely more skilled at seeming natural. Of course, nerves play a part, and in that, everyone is different.