Pure Tone Audiometry (PTA)
This is the basic hearing evaluation procedure to measure the hearing loss and to quantify the degree of hearing loss. This is done in a sound proof environment. Where the audiologist instruct the client to identify the minimum hearing level for pure tones using headphones at major six frequencies such as 250Hz, 500Hz, 1KHz, 2KHz, 4KHz, 8KHz. Bone conduction hearing threshold also measured using bone conductor transducer which is placed behind the ear. Based on all there measures audiologist identify the degree of hearing loss, pattern of hearing loss and type of hearing loss. This result has been plotted as graphical representation known as audiogram. This is used for deciding the treatment options for various hearing /ear/balance disorders. Clients with conductive hearing loss are referred to ENT doctors for treatment. Usually clients with sensori neural hearing loss are given trial with hearing aids.