Audiology

Audiology is the study of hearing disorders and habilitation/rehabilitation for individuals who have hearing loss. It encompasses the study of how the hearing mechanism works, the assessment of hearing and listening disorders and the rehabilitations of individuals who have hearing loss.

If you have an appointment with the Audiology service located at Parami General Hospital, you may be seen by one of the following doctors or technicians,

Dr Shein Myint     M.B., B.S.  M.HSc (New Zealand) ,Consultant (Audiology)

Dr Lynn Kyaw U    M.B., B.S (Ygn), Medical Officer (hearing)

Aung Aung Oo       Hearing Technician

Lin Htet Aung        Assistant Hearing Technician

Zin Thet Maung      Hearing Staff

Visual Reinforcement Audiometry (VRA)

Visual Reinforcement Audiometry is a behavioral audiometric test obtained in a sound treated room.

This test is used for children between the age of 8 months through to 2½years old. Your child is seated on your lap in front of a calibrated loudspeaker, or wearing headphones. When a sound is presented the infant’s eye-shift or head-turn response toward the sound source is rewarded by activation of a puppet mounted near the loudspeaker. Your child’s attention is then distracted back to the midline so that additional sounds can be presented.

Any test preformed through the loudspeakers rather than headphones is called “sound field” audiometry and does not test each ear separately; rather sound field audiometry fields an audiogram for the better hearing ear, if there happens to be an ear difference in hearing.

Auditory Brainstem response (ABR) Testing
An Audiology Brainstem response test (ABR) evaluates how well the sound travel along the hearing nerve pathways to a particular part of the brain called the brainstem response.

Evaluates how well the sounds travel along the hearing nerve path ways to a particular part of the brain call brainstem. An ABR may be recommended for a variety of reasons. If can be used to determine the integrity of the auditory path way or to estimate hearing threshold in newborns, older children and adults who cannot perform reliably on a behavioural test.

Recording electrode are carefully placed into the head and soft foam tips are inserted into the ear canal while the patient is sleeping quiet clicking sounds are delivering through the foam tips. Nerve responses elicited by the sound are picked up by the electrodes and then passed onto a computer to be recorded. The recordings are analyzed to determine to determine if they fall within normal limits or not.

Oto Acoustic Emissions (OAE) Testing
OAE testing measures the status of the inner ear (cochlear) specifically hair cell function.

OAE testing measures the status of the inner ear (cochlear).Specifically hair cell function. It is an objective test that can be used on patient of any age. The test can even be performed on sleeping babies because it does not rely on behavioural responses. This test is suitable for neonatal hearing screening.

Tympanometry and Acoustic Reflex testing
Tympanometry measures the function of the middle ears. A small soft probe is placed in the ear canal them the response of the middle ear to pressure changes is measured.

Acoustic reflex testing measures a reflex arc in the auditory system elicited by an intense stimulus. These tests do not directly assess hearing ability, but are interpreted in conjunction with other test results.

Speech Testing
Word recognition /speech discrimination tests the ability to hear correctly an open set of monosyllabic words

Play Audiometry
Appropriate for testing children from 30months through to five years of age.

Your child is conditioned to perform a play activity (e.g. dropping a block in a bucket) whenever they hear a sound. Once the child is conditioned, threshold of hearing can be determined by decreasing signal intensity. This test is usually performed under ears phones to obtain ears and frequency specific information.

Pure tone Audiometry (PTA)
Pure Tone Audiometry is a behavioural test measure used to determine hearing sensitivity and is conducted in a sound proof room. The test is performed using headphone and the patient is asked to respond each time they hear a sound.

Pure tone Audiometry is a behavioral test measure use to determine hearing sensitivity and is conducted in a sound proof room. The test is performed using head phones or insert phones and the patient is asked to response each time they hear a sound. Pure-tone thresholds indicate the softest sound audible to an individual at least 50% of the time. Hearing sensitivity is plotted on an audiogram, which is a graph displaying intensity as a function of frequency.

Hearing loss and Treatment
Hearing loss can be divided into two types. Conductive hearing loss (caused by some sort of mechanical problem in the external or middle ear) or sensorineural hearing loss (caused by disorders of the inner ear, hearing nerve or associated brain structure).

At Parami General Hospital pre-employment hearing assessment, Hearing assessment for IMO/STCW certificate and hearing assessment for all ages is provided.

Conductive hearing loss is often reversible and can be due to:

– Blockage of the ears by e.g, wax, inflammation, infections or middle ear fluid.

– Poor sound conduction beause of e.g. holes or scarring in the eardrum or the bone of the  middle ear (ossicles) becoming fixed and rigid.

Sensorineural hearing loss is generally not reversible and can be caused by

– Genetic make-up (this could include congenital conditions i.e those who are born with, or late     onset hearing loss)

– Head injury

– Tumours

– Infections

– Certain medication

– Exposure to loud noises

– Aging process

Some of the sign you might notice that indicate you have hearing loss include

– having to turn up the volume on the TV or radio

– finding it hard to hear someone you are talking with

– finding it hard to hear in a group situation where there is background noise, e.g in a restaurant

-having to ask people to repeat themselves.

-you find people’s speech is unclear.

Some of the signs that your child may have difficulty hearing include

– Unclear speech or delayed speech development

– Lack of responsiveness to sound

– Poor receptive language