Tweeter Test (9 KHZ Spectral Tone)

The 9 kHz spectral tone is used for the following evaluations:
^ Tweeter
^ High frequency

The 9 kHz spectral tone is a section of frequencies of equal amplitudes ranging from 8.5-9.5 kHz. The tone sounds like a group of crickets chirping.

The 9 kHz spectral tone is used for 2 reasons:
^ In order to locate the source, much like the warble tone.
^ For easier identification, for those people with high end hearing loss problems.