A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified as medical devices in most countries, and regulated by the respective regulations. Small audio amplifiers such as personal sound amplification products (PSAPs) or other plain sound reinforcing systems cannot be sold as "hearing aids".

Tympanometer is a device used to evaluate the condition of the middle ear drum (tympanic membrane) and the conduction bones by creating variations of air pressure in the ear canal. Available with various test feature like screener ,Diagnostic ,Reflex, ETF etc. for audiology equipment

An audiometer is a machine used for evaluating hearing threshold commonly used at ENT hospitals and in audiology clinics which are available in different configurations. Screening, Diagnostic and PC-based audiometers. All are much more accurate and efficient . audiology equipment