I've always heard ringing at very high frequencies; 17-20kHz when it's quiet. Can't remember ever not hearing this. Sometimes the ringing has pulsating increase

I've always heard ringing at very high frequencies; 17-20kHz when it's quiet. Can't remember ever not hearing this. Sometimes the ringing has pulsating increases in loudness synchronized with my heartbeat. Also have a little bit of tinnitus on both ears, different frequencies. Never really considered the high-frequency experience a problem; it's just always been part of my sensory experience.