Influence of the type of transducer in profound hearing loss

Pró-Fono Revista de Atualização Científica

Gil, Daniela¹  Marangoni, Andréa Tortosa¹  Universidade Federal de São Paulo¹ 

关键词: Earphones;    Vibrotactile;    Pure Tone Audiometry;    Speech Audiometry..;   

DOI  :  10.1590/S0104-56872009000300003

学科分类：医学（综合）

来源: Pró-Fono Produtos Especializados para Fonoaudiologia Ltda.

【 摘 要 】

BACKGROUND: individuals with profound hearing loss may present vibrotactile responses when tested with supra-aural earphones due to the large skull area exposed to vibration in these transducers. AIM: to verify the influence of the type of transducer when assessing air conducted pure tone thresholds in individuals with profound sensorineural hearing loss. METHOD: 50 individuals, ranging in age from 16 to 55 years, were submitted to a clinical history questionnaire, meatoscopy, and pure tone and speech audiometry, using both TDH-39 supra-aural earphones and ER-3A insert earphones. RESULTS: in both pure tone and speech testing, thresholds were higher when obtained using insert earphones, with statistical significant differences for 250Hz and 1000Hz. Considering right and left ear testing with the different transducers, this difference was greater for the right ear, with statistical significant differences only for 250 Hz. Regarding gender, it was observed that the difference between the transducers was greater in males, with statistical significant differences for 250 Hz. However, in the SDT (Speech Detection Threshold), the greatest difference was found in females. CONCLUSION: people with bilateral sensorineural profound hearing loss presented higher (worse) thresholds with insert earphones (ER-3A) than with supra aural earphones (TDH-39) for low frequencies (250Hz and 1000Hz), confirming the existence of vibrotactile responses with supra aural earphones.

【 授权许可】

Unknown