Absolute pitch—the ability to name

Absolute pitch—the ability to name or produce a note of particular pitch in the absence of a reference note—is generally considered to be extremely rare. However, it has been found that native speakers of two different tone languages—Mandarin and Vietnamese—display a remarkably precise form of ab solute pitch in enunciating words. Given these findings, it is proposed that absolute pitch may have evolved as a feature of speech, analogous to other features such as vowel quality. It is also conjectured that tone language speakers generally ac quire this feature during the 1st year of life, in the critical period when infants acquire other features of their native language. For speakers of non-tone languages, the acquisition of absolute pitch by rare individuals may be associated with a critical period of unusually long duration, so that it extends to the age at which the child can begin taking music lessons. According to this line of reasoning, the potential for acquiring absolute pitch is universal at birth, and can be realized by giving the infant the opportunity to associate pitches with verbal labels during the 1st year or so of life