Efficient Stimuli for Recording of the Amplitude Modulation Following Response: Estímulos eficientes para el registro de la Respuesta de Seguimiento a la Modulación de la Amplitud (AMFR)

Ekkehard Stürzebecher, Mario Cebulla, Ulrich Pschirrer
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引用次数: 32

Abstract

Amplitude modulation following response (AMFR) is a promising tool for objective frequency-specific assessment of hearing thresholds in children. The stimulus generally used for AMFR recording (one amplitude-modulated carrier) activates only a small part of the basilar membrane. Therefore, the response amplitude is small. Combined frequency and amplitude modulation is not significantly more effective. A new stimulus is proposed that is composed of several carriers. All carriers are modulated with the same modulation frequency. The signal to noise ratio of the response to the multiple-carrier stimulus is significantly increased compared with the usual one-carrier stimulus. Therefore, response detection near threshold is expected to be improved. AMFR also seems to be well suited to newborn hearing screening. Simultaneous recording of six responses (three AMFRs from each ear) to 1-, 2-, and 4-kHz multiple-carrier stimuli of a 40 dB HL stimulus level is demonstrated in normally-hearing adults. Verification in babies will be necessary.
记录振幅调制后反应的有效刺激:记录振幅调制后反应(AMFR)的有效刺激
响应后调幅(AMFR)是一种很有前途的工具,用于客观的频率特异性评估儿童听力阈值。通常用于AMFR记录的刺激(一个调幅载波)只激活一小部分基底膜。因此,响应幅值较小。频率和幅度组合调制并不明显更有效。提出了一种由多个载体组成的新刺激方案。所有载波都用相同的调制频率调制。与通常的单载波刺激相比,多载波刺激响应的信噪比显著提高。因此,阈值附近的响应检测有望得到改进。AMFR似乎也很适合用于新生儿听力筛查。在听力正常的成年人中,同时记录对40db HL刺激水平的1、2和4 khz多载波刺激的6个反应(每只耳朵3个AMFRs)。在婴儿身上进行验证是必要的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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