This will depend on your life style. Perfect hearing is -10 to 10, Normal hearing is 0 to -10 and Average is -10 to -20 dBs. Some people that are involved in Music will want a hearing aid if they are at -20 because they will be needing to hear some frequiencies more clearly.GENERALY speaking, if you are at -30 and below in frequencies 250, 500, 750, 1000, 1200, 2000 ---- You will want a digital hearing aid.There is an American Guy in South America that I bought My Aids from. He works in Peru helping the Poor and the 3rd world people hear. He has a company called AccuToneUSA and he told me to send my Ear Impressions to Him. He build me 2 VERY nice 32 channel 64 band hearing aids for about $1200 total. These hearing aids retail in the USA for $4000 each. So you should contact him if you have any questions. his name is Doug at accutone, and his email is
accutoneusa@gmail.comHope I answered your question!!