Otolaryngology Book

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Audiogram

Aka: Audiogram, Audiometry, Pure-Tone Audiometry
  1. Indications
    1. Hearing Testing
    2. Hearing Loss Evaluation
  2. Preparation
    1. Testing environment should be quiet
    2. Patient should avoid loud noise exposure for 14 hours prior to testing (e.g. music via headphones, motorcycle)
  3. Technique: Pure-Tone Audiometry
    1. Threshold Search Audiometry (Hughson-Westlake Method)
      1. Start with the better hearing ear
      2. Hearing is tested in each ear at frequencies between 250 Hz to 8000 Hz
        1. Frequencies tested at one octave intervals: 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz, 8000 Hz
        2. Typical sequence: 1k, 2k, 3k, 4k, 8k, 1k, 500, 250
      3. Each frequency is tested at volumes between 0-90 decibels (logarithmic, loudness doubles every 10 decibels)
        1. Start with an easily heard DB level
        2. Test each heard tone again at 10 DB lower until no response
        3. Then increase by 5 DB, testing until tone heard again
    2. Screening (typical handheld device)
      1. Hearing frequencies tested: 500 to 4000 Hz (speech spectrum)
      2. Loudness tested: 25-30 DB in adults (15-20 DB in children)
  4. Interpretation
    1. Normal hearing
      1. All frequencies are heard at 20 decibels or less
    2. Hearing Loss across all frequencies (typically 40 DB loss)
      1. Conductive Hearing Loss (e.g. Cerumen Impaction)
      2. Otosclerosis
    3. Low frequency Hearing Loss
      1. Meniere's Disease (severe)
    4. Low to mid-frequency Hearing Loss (with bone conduction better than air conduction)
      1. Tympanic Membrane Perforation
    5. High frequency Hearing Loss
      1. Noise-Induced Sensorineural Hearing Loss (4000 Hz and higher)
      2. Age-related Hearing Loss - Presbycusis (2000 Hz and higher)
  5. Efficacy: Handheld Audiometry for Sensorineural Hearing Loss (over age 5 years)
    1. Test Sensitivity: 92%
    2. Test Specificity: 94%
  6. Resources
    1. Audiogram of normal sounds
      1. http://www.nmit.edu.au/Content/images/centre_of_excellence/frequency_intensity_of_sounds.jpg
  7. References
    1. Walker (2012) Am Fam Physician 87(1): 41-7 [PubMed]

Audiometry (C0004286)

Definition (NCI_CDISC) Testing conducted utilizing a manual or microprocessor audiometer to test for hearing loss.
Definition (NCI) Testing conducted utilizing a manual or microprocessor audiometer to test for hearing loss.
Definition (MSH) The testing of the acuity of the sense of hearing to determine the thresholds of the lowest intensity levels at which an individual can hear a set of tones. The frequencies between 125 and 8000 Hz are used to test air conduction thresholds and the frequencies between 250 and 4000 Hz are used to test bone conduction thresholds.
Definition (PSY) Specific procedures or audiometric tests used to measure hearing acuity and range in the diagnosis and evaluation of hearing impairments. Consider also AUDIOLOGY and SPEECH AND HEARING MEASURES.
Definition (CSP) specific test to measure the acuity of the sense of hearing to determine the thresholds of the lowest intensity levels at which an individual can hear a set of tones; frequencies between 125 and 8000 Hz are used to test air conduction thresholds and the frequencies between 250 and 4000 Hz are used to test bone conduction thresholds.
Concepts Diagnostic Procedure (T060)
MSH D001299
ICD9 95.41
SnomedCT 141925003, 34091002, 277300001, 164760009, 21727005
English Audiometries, audiometry (procedure), audiometry, Hearing Test, Test;audiometry, audiometric testing, audiometry tests, Electrical tracings;ear, audiometric test, audiometry testing, Audiometry (procedure), AUDIOMETRY, Audiometric test, Audiometric test (procedure), Audiometric test, NOS, Audiometry, NOS, Audiometric Test, Audiometry, audiometry test
Dutch audiometrie, audiometrische test, Audiometrie
Italian Prove audiometriche, Audiometria
Portuguese Prova audiométrica, Audiometria
Spanish Prueba audiométrica, audiometría (procedimiento), audiometría, prueba audiométrica, Audiometría
Japanese 聴力検査, チョウリョクケンサ
Swedish Hörselmätning
Czech audiometrie, Audiometrický test, Audiometrie
Finnish Audiometria
Russian AUDIOMETRIIA, АУДИОМЕТРИЯ
Croatian AUDIOMETRIJA
Polish Audiometria
Hungarian Audiometriás vizsgálat, Audiometria
Norwegian Audiometri, Hørselsmåling
French Audiométrie
German Audiometrie, Gehörprüfung, Hörprüfung
Sources
Derived from the NIH UMLS (Unified Medical Language System)


Audiometry, Pure-Tone (C0004292)

Definition (MSH) Measurement of hearing based on the use of pure tones of various frequencies and intensities as auditory stimuli.
Concepts Diagnostic Procedure (T060)
MSH D001301
SnomedCT 252577008
English Audiometry, Pure Tone, Audiometry, Pure-Tone, Pure-Tone Audiometry, pure tone audiometry, pure-tone audiometry, PTA - Pure tone audiometry, Pure tone audiometry, Pure tone audiometry (procedure)
Swedish Tonaudiometri
Czech audiometrie čistými tóny
Finnish Äänesaudiometria
Russian AUDIOMETRIIA BEKESHI, AUDIOMETRIIA TONAL'NAIA, АУДИОМЕТРИЯ БЕКЕШИ, АУДИОМЕТРИЯ ТОНАЛЬНАЯ
French Audiométrie tonale liminaire, Audiométrie tonale
Polish Audiometria czystego tonu
Norwegian Toneaudiometri, Rentoneaudiometri, Reintoneaudiometri
Spanish audiometría tonal (procedimiento), audiometría tonal, Audiometría de Tonos Puros
German Audiometrie, Reinton-
Italian Audiometria del tono puro
Dutch Audiometrie, pure toon-, Toonaudiometrie, Toonaudiometrie, pure
Portuguese Audiometria de Tons Puros
Sources
Derived from the NIH UMLS (Unified Medical Language System)


Hearing Tests (C0018786)

Definition (NCI) A graphic record of the softest sounds that a person can hear at various frequencies, used to measure hearing loss.
Definition (CSP) a general term for the measurement of hearing.
Concepts Diagnostic Procedure (T060)
MSH D006320
ICD9 95.42, 95.47
SnomedCT 34091002, 141914007, 148632000, 164745006, 398171003, 252575000, 32921008, 398280008
English Hearing Tests, Hearing Test, Test, Hearing, Tests, Hearing, examination of hearing, examination of hearing (physical finding), hearing, hearing exam, Clinical hearing test, Hearing examination NOS, clinical hearing tests, hearing tests, audiograms, exams hearing, Test;hearing, auditory tests, hearing test, auditory test, audiogram, hearing testing, auditory testing, hear test, hearing examination, Individual hearing examination (procedure), Hearing test, Hearing examination, Clinical test of hearing, Auditory testing, Individual hearing examination, Audiogram, HT - Hearing test, Hearing examination (procedure), Audiogram (procedure), Auditory acuity evaluation (procedure), Auditory acuity evaluation, Auditory testing (procedure), Hearing examination, NOS, Clinical test of hearing, NOS, Auditory acuity evaluation, NOS, Audiogram, NOS, Hearing examination, not otherwise specified
Italian Audiogramma, Test dell'udito, Esami audiometrici
Dutch gehoortest, audiogram, Gehoortest, Gehoortests, Test, gehoor-
German Hoertest, Audiogramm, Hörprüfungen, Hörtests
Portuguese Prova de audição, Audiograma, Testes Auditivos
Spanish Prueba de audición, evaluación de la agudeza auditiva, examen de la audición (procedimiento), prueba clínica de la audición, examen de la audición, Tests Auditivos, audiograma (procedimiento), audiograma, evaluación de agudeza auditiva (procedimiento), evaluación de agudeza auditiva, examen audiológico (procedimiento), examen audiológico, prueba auditiva (procedimiento), prueba auditiva, Audiograma, Pruebas Auditivas
Japanese 聴力図, 聴覚検査, チョウカクケンサ, チョウリョクズ
Swedish Hörseltester
French Test d'audition, Tests de l'audition, Tests auditifs, Audiogramme
Czech sluchové testy, Test sluchu, Audiogram
Finnish Kuulokokeet
Russian SLUKHOVYE TESTY, СЛУХОВЫЕ ТЕСТЫ
Croatian SLUH, ISPITIVANJE
Polish Badanie słuchu, Testy słuchu, Próby słuchowe
Hungarian Audiogram, Hallás vizsgálat
Norwegian Hørselsprøver, Hørselstester
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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