Amplified Business Telephones for the Deaf and Hard of Hearing
To determine which amplified phone suits your needs, it is suggested you find out what decibel (dB) hearing loss you have. If you wear hearing aids, your audiologist can help. As a general guideline, a phone with up to 28dB is good for mild hearing loss; 30-48dB for moderate hearing loss; and 50dB+ for severe hearing loss.