Tweeter Test

The 8.5k-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-9.5k Hz. This sounds like a group of crickets chirping. This type of tone is used for 2 reasons. One, much like the warble tone, it is easy to locate it's source, and two, this type of tone is easier to identify for those people with high end hearing loss problems.