The sound is good for you :)
It is attuning you to the fabric of creation the Sound of God. Beethoven heard a variation of the celestial sound and he tried to translate this in his classics. It gets better if you go to a quiet place, sing the HU mantra, and listen.
Any sound exists because of just one original sound. The HU is said to be the closest to the unspeakable sound in this side of creation. Try it :)
You do not need any austerity and such mechanics when singing HU. All you need is to come with a loving heart by focusing on love...your dog, spouse or any event that had brought joy to your life in the past will do on "coming with love".
What you may experience range from being flooded with intense love, seeing bright and scintillating lights, hearing sounds and even experiencing an explosion of your awareness that you could accumulate vast information in seconds. It is limitless what you may experience.
Its: Love in your heart and attention in the Spiritual eye once again. No directing anything or willing things around. Its simply an appointment with this force we call Love...
Jason has had tones in his ears for literally 20 something years. So it is VERY common especially with ORMUS or M-state like products. People can get those sounds that are not using those products but just have high vibration energy. Jason just got used to them. I experience them from time to time as a short episode in my ears. It sounds like a low grade static and then a higher pitched whoosh that is very thin and high will escalate until it levels out. It lasts no more than a minute for me. I have heard of that it can be caused by too much ear wax as well.