title: The effect external and middle ears have in otoacoustic emissions.
abstract: Characteristics of how external and middle ear resonance frequency can impact the capture of otoacoustic emissions.
  
  
  OBJECTIVE
  to study the impact of external and middle ear resonance frequency in otoacoustic emissions.
  
  
  METHODS
  Prospective, clinical, series study.
  
  
  METHODS
  Microphone-probe measurements were made in the external ear, together with multifrequency timpanometry distortion product transient otoacoustic emissions in 19 right and 20 left ears from male individuals and 23 right and 23 left ears from female individuals with 17 to 30 years of age. The 85 ears were audiologically normal.
  
  
  RESULTS
  We did not observe statistically significant associations between the best otoacoustic emission best frequencies and the occluded external and middle ear resonance frequencies.
  
  
  CONCLUSIONS
  Response levels for both transient and distortion product otoacoustic emissions are not influenced by the external and middle ear resonances alone.
authors.affiliation: Faculdade de Ciências Médicas, Universidade Estadual de Campinas.
authors.forename: Christiane Marques do
authors.initials: CM
authors.lastname: Couto
authors.forename: Renata Mota Mamede
authors.initials: RM
authors.lastname: Carvallo
mesh_terms: D000158:Acoustic Impedance Tests; D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001300:Audiometry, Evoked Response; D004431:Ear, External / Q000502:physiology*; D004432:Ear, Middle / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology*; D011446:Prospective Studies; D012016:Reference Values; D055815:Young Adult