With a low frequency hearing loss, the typical open fit hearing aid may not be the best choice, as they are designed to allow low frequencies to escape out of the ear on purpose.
Thus, hearing aids that occlude or plug the ear completely allow for better correction with these losses. Yet, many reverse slope wearers complain of their voice being booming and loud and hard to guage, particularly if the hearing loss is a sensorineural hearing loss (nerve deafness) versus conductive loss where the voice issues are less frequent.
Thus, vented hearing aids are often used.
To best match this type of hearing loss, a in the ear (cic, itc, ite) type of hearing aid is often used, with varying results.
You can also use receiver in the ear BTE’s, such as the Phonak Micro Power or any other type of traditional tubed BTE’s also. Lots of professional speakers like to be able to control their hearing aids without putting their fingers in their ears, thus the Phonak and Siemens models are very popular.
One point…if you have a SNHL (nerve deafness) type of low frequency hearing loss, it can sometimes take many adjustments to get ANY hearing aid set to be satisfactory, as there are so many variables with this type of hearing loss, such as cochlear dead spots, forward spread of masking (low tones overpowering consanant sounds, etc and these need to be disussed w/ your audi.
Thus you want to work with a professional that is both knowledgeable and patient and patience is usually necessary from the patient also.
Hope this helps you out.