Silva Kilza Arruda de Lyra e, Urosas Juliana Granja, Sanches Seisse Gabriela Gandolfi, Carvallo Renata Mota Mamede
Codas. 2013;25(1):29-33. doi: 10.1590/s2317-17822013000100006.
To characterize the normal values of acoustic energy reflectance obtained with pure-tone stimulation in neonates prior to hospital discharge.
Seventy-seven infants (37 girls and 40 boys) were evaluated by measuring acoustic reflectance using pure-tone stimuli, transient-evoked otoacoustic emissions, and tympanometric probe frequencies of 226 Hz and 1 kHz.
At low frequencies (258-750 Hz), greater energy reflectance was observed, while at medium frequencies (1-3 kHz), greater energy absorption was observed. There was no difference between ears or between genders.
Normal energy reflectance values were obtained for the studied population. The data indicate a reflectance curve with a distinct configuration for the studied age.
确定新生儿出院前纯音刺激下获得的声能反射率的正常值。
通过使用纯音刺激、瞬态诱发耳声发射以及226Hz和1kHz的鼓室导抗测试探头频率测量声反射率，对77名婴儿（37名女孩和40名男孩）进行评估。
在低频（258 - 750Hz）时，观察到更高的能量反射率，而在中频（1 - 3kHz）时，观察到更高的能量吸收率。双耳之间以及性别之间没有差异。
获得了所研究人群的正常能量反射率值。数据表明所研究年龄的反射率曲线具有独特的形态。
