I want to know that what "type of experiences" people generally
observe in the haunted houses ?? Please provide 'general information'
about that question and thanks for that help from Shoaib.

A Researcher can probably give you much more specific information, but
generally speaking, these are at least two things I have heard of in
haunted houses:

*Shaking of haunted furniture items, or shaking of furniture in haunted rooms.
*"White Noise", that is, noise (sometimes of comprehendable words)
that can only be picked up with special equipment that is
representative of the dead talking.