What is a pitch (in sound)?

It is related to the frequency i.e. if more frequency more pitch and vice versa.

So when we talk, if we speak speedily then more frequency but if we speak slowly then low frequency? right or wrong? then how do we know that his voice has high frequency (or pitch) than the other?

It is related to the frequency i.e. if more frequency more pitch and vice versa.

So when we talk, if we speak speedily then more frequency but if we speak slowly then low frequency? right or wrong? then how do we know that his voice has high frequency (or pitch) than the other?