Hello, I have Philips 9050 from Costco. I am trying to adjust the settings for female voices only. They are too loud when they speak loudly for some vowels and I don’t know how to adjust the programming. Would you have an idea for me? I’ve tried lowering the 65 or 80 db in the 750 hz and above, but it doesn’t work - I lose my voice in general and I can’t perceive well anymore.