Caruso Department of Otolaryngology, University of Southern California, Los Angeles, CA, 90033, USA.
Department of Physics & Astronomy, University of Southern California, Los Angeles, CA, 90033, USA.
J Assoc Res Otolaryngol. 2024 Apr;25(2):91-102. doi: 10.1007/s10162-024-00934-5. Epub 2024 Feb 26.
At the 2004 Midwinter Meeting of the Association for Research in Otolaryngology, Glenis Long and her colleagues introduced a method for measuring distortion-product otoacoustic emissions (DPOAEs) using primary-tone stimuli whose instantaneous frequencies vary continuously with time. In contrast to standard OAE measurement methods, in which emissions are measured in the sinusoidal steady state using discrete tones of well-defined frequency, the swept-tone method sweeps across frequency, often at rates exceeding 1 oct/s. The resulting response waveforms are then analyzed using an appropriate filter (e.g., by least-squares fitting). Although introduced as a convenient way of studying DPOAE fine structure by separating the total OAE into distortion and reflection components, the swept-tone method has since been extended to stimulus-frequency emissions and has proved an efficient and valuable tool for probing cochlear mechanics. One day-a long time coming-swept tones may even find their way into the audiology clinic.
在 2004 年耳鼻喉研究协会冬季年会上，Glenis Long 和她的同事们介绍了一种使用时频连续变化的初始纯音刺激来测量失真产物耳声发射（DPOAE）的方法。与使用离散纯音刺激在正弦稳态下测量、频率定义明确的标准 OAE 测量方法不同，扫频法在频率上扫过，其速率通常超过 1 个倍频程/秒。然后，使用适当的滤波器（例如，通过最小二乘法拟合）对得到的响应波形进行分析。虽然扫频法最初被引入是为了通过将总耳声发射分离为失真和反射分量来方便地研究 DPOAE 精细结构，但此后它已扩展到刺激频率耳声发射的研究，并已被证明是研究耳蜗力学的有效且有价值的工具。有朝一日——尽管这一天还很遥远——扫频音可能会进入听力学临床。
