A consonant is a speech sound that’s not a vowel. The sound of a consonant is produced by a partial or complete obstruction of the air stream by a constriction of the speech organs.
There are 24 consonant sounds in English as in the figure with the manner and place of articulation:
Examples:
/s/ sleep /sliːp/
/p/ poor /pɔː/ .. in British English r does not pronounced.
/h/ hoop /huːp/
Linguistics 