Speech Sounds in English There are 24 consonant and 20 vowels sounds Vowels are those words which require less use of mouth part. Consonant are those words which uses parts of mouth. Vowels. these are some example vowels. pairs of vowels (a & aa) are different by lengthening the other, same follows for other to. Consonants as said consonants require other parts to here are a few example . Oral sounds: it only uses oral cavity Nasal sounds: sounds that uses both oral cavity and nasal cavity, with help of uvula Velar sounds : Sounds that use vellum to produce sound Palatal sounds : Sounds that use flat part of tongue Retroflex sounds : Sounds are produced by bending the tongue upward to to muscle. Dental sounds: Sounds that are produced by touching tongue to the teeth Labial sounds : Sounds that are produced using lips