According to a study by  Hearing Health Foundation (HHF) it has been analysed that there are  five levels of hearing loss, from normal hearing to profound hearing loss. In a study by HHF, a hearing specialist suggests a hearing aid starting with the second level of hearing loss, moderate hearing loss.

• With moderatehearing loss, it is difficult hearing sounds quieter than 41 decibels to 55 decibels, ex: refrigerator humming or normal conversation. In this case you often ask people to speak louder or repeat themselves.“And when ty the time they reach moderate degrees of hearing loss, at least half the people wear some sort of amplification, either a hearing aid or one of the low-cost personal sound amplification products, or PSAPs,”.

• Secondly with moderately severehearing loss, you find it difficult to hear sounds quieter than 56 to 70 decibels, ex : nearby washing machine or dishwasher. According to the HHF,in this case you are not be able to hear speech without a hearing aid. According to a study the latest digitally programmed hearing aids make it easier for people with this level of hearing loss to pick up conversation without raising the volume or using special speech recognition techniques, like lip reading.

• And with severe hearing loss, you find it very difficult to hear sounds quieter than 71 to 90 decibels, ex : nearby motorcycle. According to the HHF, speech will be inaudible without a hearing aid or a surgically implanted hearing device.

• With profound hearing loss, you find it difficult hear sounds quieter than 91 decibels. According to the a study by HHF, even very loud sounds, ex traffic and fire alarms, cannot be heard without a hearing aid at this point. “By the time you’re at a profound hearing loss, it’s increasingly difficult for people to wear hearing aids because, by the time they turn them up to be effective, they become uncomfortably loud.