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Chapter 4

LING 3P97 Chapter Notes - Chapter 4: Mastoid Part Of The Temporal Bone, Eure, Temporal Bone

Course Code
Barbra Zupan

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LING 3P97 Chapter 4: Pure Tone Audiometry
Audiometry: measurement of a persons ability to hear dierent sounds
Audiometric: used to describe dierent aspects pertaining to audiometry such as
results or testing
Pure tone audiometry: nding the lowest SPL for dierent pure tones that a person
is barely able to hear
Threshold: the lowest SPL of a pure tone to which a person responds to at least
50% of the time
Audiometer: instrument used for hearing tests
Diagnostic/clinical audiometer: instrument capable of performing a variety of
hearing tests, including pure tone audiometry
Computer based audiometry: hearing tests where a computer is used to generate
and control the signals
Automatic audiometer: has the capability of automatically changing the signal level
based on the response of the patient
Screening audiometer: smaller, portable and only uses limited pure tones to assess
Transducers: device capable of vibrating when activated by an electric signal from
the oscillator (Ex. headphones)
Transducing: converting electrical signals into vibrations that can be heard
Insert earphone: air conduction transducer that’s placed within the ear canal
Supra aural earphone: air conduction transducer placed on the auricle; converts
electrical energy to acoustic energy
Ultra high frequency earphone: transducer used for air conduction testing where
frequencies above 8000Hz are to be evaluated
Speakers: electroacoustic transducer that converts electrical energy to acoustic
energy; used in sound eld testing
Sound/free eld testing: presentation of test materials using loudspeakers
Bone conduction vibrator: transducer which has a hard plastic casing that is set
into vibration by pure tones; placed behind ear on mastoid portion of temporal bone
Masker: noise that is used to evaluate or make inaudible a test signal; noise that is
presented in the non-test ear during clinical masking
Air conduction: earphones are used to deliver the sounds to the patient; stimulates
entire auditory system
Bone conduction: when bone conductor vibrator is used to deliver sounds to the
patient; delivers the vibrations directly to the inner ear bypassing the outer and
middle ear portions
Sensorineural hearing loss: caused by disorders in the inner ear or neural pathways;
characterised by elevation of both bone conduction and air conduction thresholds
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