Behind-the-ear (BTE) hearing aidsBehind-the-ear (BTE) hearing aids are the best type of hearing aid for treating profound hearing loss. The more significant case accommodates a more powerful amplifier than other styles, which is essential for those with severe hearing problems because more power gives them greater access to softer sounds. Additionally, the Bigger battery (size 675), allows for more amplification. Smaller in-the-ear (ITE) hea...