The phrase "childish treble" is often used to describe a high-pitched or whiny voice that sounds immature or naïve. Some synonyms for this phrase include "juvenile soprano," "infantile falsetto," or "immature alto." These terms are often used to describe the speech patterns of children or adolescents, but can also refer to adults who have retained a childlike timbre in their voice. Other related phrases include "baby talk" or "girlish inflection," which can suggest a lack of sophistication or maturity in the speaker. Regardless of the term used, the concept of a childish treble conveys a sense of innocence and youthfulness.