Talking Hearing Loss

I came across a nifty online tone generator which could be really useful

What can I use this tone generator for?

Testing your hearing
This online frequency generator could be used to determine what is the highest frequency you can hear. It can also help to determine if there are frequencies you can hear better in one ear compared to the other. You could even use it to determine how your thresholds for particular frequencies differ when using hearing aids.

Tinnitus frequency matching. 
If you have pure-tone tinnitus, this online frequency generator can help you determine its frequency. Knowing your tinnitus frequency can enable you to better target masking sounds and frequency discrimination training. When you find a frequency that seems to match your tinnitus, make sure you check frequencies one octave higher (frequency × 2) and one octave lower (frequency × ½), as it is easy to confuse tones that are one octave apart.

Instructions