Degrees of Hearing Loss
Per World Health Organization (WHO), a normal hearing threshold is someone who can hear all frequencies from 0-25dB.
MILD (26-40dB)
A person with mild hearing loss may hear most of the speech sound but might find it difficult to hear the soft sound especially in the presence of background noise.
MODERATE (41-60dB)
A person with moderate hearing loss may find it difficult to understand speech sound talking at a normal conversational level.
SEVERE (61-80dB)
A person with severe hearing loss may find it difficult to hear speech sound even in a shouted voice.
PROFOUND (81dB and up)
A person with profound hearing loss typically cannot hear any speech or environmental sound even at the loudest level.
