HI
@GBB
I advise you not to use earbuds no matter how good they are and play white or pink noise through them into the ear. They are nothing like proper white noise generators that you are calling in-ear-masker. Masker is old terminology is no longer used today because tinnitus should never be masked. The white noise should be set lower than the tinnitus and not masking or covering up the tinnitus so it can't be heard. If you do this two things are likely to haven: You risk making the tinnitus worse and secondly your brain will never learn to habituate to the tinnitus if it cannot hear it.
Please read the post below which is a segment taken from a longer post that I wrote about: Headphones, earbuds and white noise generators. I advise you never to use headphones, earbuds or headset even at low volume.
I wish you well.
Michael
White noise generators and Hearing aids.
Some people question the use of white noise generators and hearing aids and believe they are the same as headphones or earbuds, this is not the case. White noise generators and hearing aids don't usually irritate the auditory system due to the volume being kept low and its frequency range remains constant, so there is no syncopation within it unlike music. In addition to this the sound is delivered through a small plastic tube that wraps over the back of the ear and enters the entrance to the ear canal. At the end of the tube there is a tiny aperture/hole where sound emits.
Headphones and earbuds use a large speaker/diaphragm in comparison to emit sound into the ear. Compared to white noise generators and hearing aids, the sound is crude, unregulated and can cause irritation.
Although white noise generators can be bought privately to treat tinnitus and hyperacusis, I don't advise anyone to do so, unless a Hearing Therapist/Audiologist has first tested their auditory system for suitability. A person must also be shown how to use these devices correctly, as improper use can make the tinnitus worse. Furthermore, they are normally used in conjunction with Tinnitus Retraining Therapy to get optimum results.
I also don't advise listening to white noise, pink noise, brown, noise etc through headphones even at low volume. It is best to always be under the care of an Audiologist/Hearing Therapist that specialises in tinnitus and hyperacusis treatment and management.