The document discusses different types of speech sounds: 1. Voiced sounds involve vibration of the vocal cords, while voiceless sounds involve little vibration of the vocal cords. The difference can be felt by placing fingers on the mouth or ears. 2. Speech sounds are classified based on their manner of articulation, including stops/plosives, fricatives, affricates, nasals, laterals, vibrants, and semi-vowels. Each category is defined by how the air flow is obstructed in the mouth. 3. Examples are given for common consonant sounds in English to demonstrate each manner of articulation, such as [p] and [b] for stops, [s] and [