1. High level: This is the highest pitch that a person can produce. It is often used to convey excitement, enthusiasm, or surprise.
2. Mid-high level: This is a slightly lower pitch than the high level. It is often used to convey interest, curiosity, or attention.
3. Mid level: This is the neutral pitch that a person uses most often. It is often used to convey information or to state facts.
4. Low level: This is the lowest pitch that a person can produce. It is often used to convey boredom, disappointment, or sadness.
The pitch level of speech can also be used to convey different emotions. For example, a high pitch level can convey excitement or joy, while a low pitch level can convey sadness or anger.