D'haenens Wendy, Dhooge Ingeborg, De Vel Eddy, Maes Leen, Bockstael Annelies, Vinck Bart M
ENT Department, University of Ghent, Ghent, Belgium.
Int J Audiol. 2007 Aug;46(8):399-406. doi: 10.1080/14992020701347329.
The present study utilized a commercially available multiple auditory steady-state response (ASSR) system to test normal hearing adults (n=55). The primary objective was to evaluate the impact of the mixed modulation (MM) and the novel proposed exponential AM(2)/FM stimuli on the signal-to-noise ratio (SNR) and threshold estimation accuracy, through a within-subject comparison. The second aim was to establish a normative database for both stimulus types. The results demonstrated that the AM(2)/FM and MM stimulus had a similar effect on the SNR, whereas the ASSR threshold results revealed that the AM(2)/FM produced better thresholds than the MM stimulus for the 500, 1000, and 4000 Hz carrier frequency. The mean difference scores to tones of 500, 1000, 2000, and 4000 Hz were for the MM stimulus: 20+/-12, 14+/-9, 10+/-8, and 12+/-8 dB; and for the AM(2)/FM stimulus: 18+/-13, 12+/-8, 11+/-8, and 10+/-8 dB, respectively. The current research confirms that the AM(2)/FM stimulus can be used efficiently to test normal hearing adults.
本研究使用了一种商用多频听觉稳态反应（ASSR）系统来测试听力正常的成年人（n = 55）。主要目的是通过受试者内比较，评估混合调制（MM）和新提出的指数调幅（AM(2)/调频（FM）刺激对信噪比（SNR）和阈值估计准确性的影响。第二个目的是为两种刺激类型建立一个标准数据库。结果表明，AM(2)/FM和MM刺激对SNR有相似的影响，而ASSR阈值结果显示，对于500、1000和4000 Hz载波频率，AM(2)/FM产生的阈值比MM刺激更好。MM刺激对500、1000、2000和4000 Hz音调的平均差异分数分别为：20±12、14±9、10±8和12±8 dB；AM(2)/FM刺激的平均差异分数分别为：18±13、12±8、11±8和10±8 dB。当前研究证实，AM(2)/FM刺激可有效地用于测试听力正常的成年人。
