Tweeter Test (9 Khz Spectral Tone)

The 9 kHz spectral tone is used for tweeter or high frequency evaluation. The tone is a section of frequencies of equal amplitudes ranging from 8.5 kHz to 9.5 kHz. The sound is similar to crickets chirping.

This type of tone is used for the following reasons:
^ Much like the warble tone the source is easy to locate
^ The spectral tone is easier to identify for those people with high end hearing loss condition