Frequently Asked Questions
What is Pure Tone Audiometry?
To measure hearing sensitivity Pure Tone Audiometry is used and it is a behavioral test. The peripheral and central auditory systems are measured and evaluated in this test. The sensitivity to hearing is recorded on an audiogram graph in a way that intensity is displayed as a function of frequency. The degrees of hearing loss are:
- Normal hearing - (0 - 25 dB)
- Mild hearing loss - (26 - 40 dB)
- Moderate hearing loss - (41 - 55 dB)
- Moderate to severe hearing loss - (56 - 70 dB)
- Severe hearing loss - (71 - 90 dB)
- Profound hearing loss - (>90 dB)
What are the types of hearing loss?
Generally, there are 3 types of hearing loss and they are:
- Conductive - it is secondary to an outer ear or middle ear abnormality, which can include abnormalities of the tympanic membrane.
- Sensorineural - it is secondary to cochlear abnormalities and/or an abnormality of the auditory nerve or central auditory pathways.
- Mixed - a combination of conductive and sensorineural types of hearing loss.
When is Pure Tone Audiometry indicated?
To determine the type, degree, and configuration of hearing loss, Pure-Tone Audiometry is indicated. However, please consult ENT Specialist or Audiologist before undergoing Pure-Tone Audiometry.
Who are not recommended to undergo Pure-Tone Audiometry?
Individuals who are unable to cooperate because of young age or other conditions are not recommended to undergo Pure Tone Audiometry. They may need to have the auditory system tested by other methods.
Is anesthesia required for Pure Tone Audiometry?
No, the patient who is undergoing Pure Tone Audiometry should not be sedated or given Anesthesia.
What are the types of equipment used during Pure Tone Audiometry?
Depending on the test and the individual undergoing the test, the instruments used are:
- Insert earphones
- Bone conduction oscillator
What auditory disorders can be detected by Pure Tone Audiometry?
- Presbycusis (hearing loss by age)
- Otitis media
- Noise-induced hearing loss
- Meniere diseases