What test frequencies are required according to ANSI S3.21?

The correct response indicates that the required test frequencies according to ANSI S3.21 include 500, 1000, 2000, 3000, 4000, and 6000 Hz. This standard specifies these frequencies as essential for effective hearing assessment, as they encompass the critical range of human hearing. Testing at these specific frequencies allows for a comprehensive evaluation of a person's hearing ability across a broad spectrum of pitch, which is particularly important for detecting hearing loss and determining the need for further intervention or amplification.

Including the full range of frequencies up to 6000 Hz ensures that the evaluation considers both the lower and higher pitches that individuals may encounter in everyday communication. It is important for hearing technicians to adhere to this standard when performing audiometric testing, as it provides a reliable frame of reference for assessing an individual's auditory capabilities.