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Objective Hearing Literature Review

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CHAPTER TWO LITERATURE REVIEW This chapter are divided into three part. The first part is about the term definition. It explained about the term related to the topic of the research. Then, the second part disscussed in detail all about the tympanometry including the definition, the test, how to conduct the test, the result of the test, and the disease related to the test. Last but not least, the final part of this chapter described about the effect of the race, gender and age to the tympanometry’s result. 2.1 TERM DEFINITION In this sub chapter three term will be defined; norm, malay and young adult. The first term is norm. Norm is defined as an accepted standard or a way of behaving or doing things that is most people agree with (Cambridge …show more content…

It is one of the objective hearing tests that are used in Audiology clinic. According to National Acoustic Laboratories, the objective hearing test require only passive co-operation from the participant. The test is performed to gain insight into the potential causes of the abnormality. The electophysiological testing and otoacoustic emissions (OAEs) are also the objective audiometric test. Most of the objective audiometric tests provide information about the hearing mechanism only. The tests are intended to show subject’s auditory function by recording physiological information rather than behavioral responses. The information from the test gives an assumption regarding the subject’s ability to hear. The tests are classified according to the part of the hearing mechanism. For example the tympanometry is to assess the middle ear system, and otoacustic emission tests the mobility of outer hair …show more content…

Otitis media effusion is classified as sub-acute when it persists from three weeks to three months after the onset of acute otitis media. After three months, it is classified as chronic otitis media. The upper respiratory tract infection (URTI) is one of the most common factors that can trigger the acute otitis media. Other than that, the obstruction of Eustachian tube is the most significant precursor event associated with acute otitis

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