Tweeter Test - Delco Audio System

The 8.5k Hz - 9.5k Hz spectral tone is used for tweeter or high frequency evaluation. This tone is a section of frequencies of equal amplitudes ranging from 8.5k Hz - 9.5k Hz. This sounds like a group of crickets chirping. This type of tone is used for two reasons:
1. Like the warble tone, it is easy to locate its source.
2. This type of tone is easier to identify for those people with high end hearing loss problems.