Journal Article

Doppler Frequency‐Shift Information Processing in WOx‐Based Memristive Synapse for Auditory Motion Perception

Tao, Ye, Liu, Yichun, Lin, Ya, Zhao, Xiaoning, Cheng, YanKun, Zeng, Tao, Wang, Zhongqiang, Shan, Xuanyu, Xu, Haiyang

2023

Overview

Auditory motion perception is one crucial capability to decode and discriminate the spatiotemporal information for neuromorphic auditory systems. Doppler frequency‐shift feature and interaural time difference (ITD) are two fundamental cues of auditory information processing. In this work, the functions of azimuth detection and velocity detection, as the typical auditory motion perception, are demonstrated in a WOx‐based memristive synapse. The WOx memristor presents both the volatile mode (M1) and semi‐nonvolatile mode (M2), which are capable of implementing the high‐pass filtering and processing the spike trains with a relative timing and frequency shift. In particular, the Doppler frequency‐shift information processing for velocity detection is emulated in the WOx memristor based auditory system for the first time, which relies on a scheme of triplet spike‐timing‐dependent‐plasticity in the memristor. These results provide new opportunities for the mimicry of auditory motion perception and enable the auditory sensory system to be applied in future neuromorphic sensing. A auditory sensory system with motion perception is demonstrated by using a WOx‐based memristive synapse. Due to the coexistence of the volatile mode and semi‐nonvolatile mode in the Ar‐plasma‐treated (APT) WOx memristor, the functions of azimuth detection and velocity detection are realized via implementing the high‐pass filtering and processing the spike trains with frequency shift in both modes, respectively.

• Publisher: John Wiley & Sons, Inc,Wiley
• Subject: auditory motion perception / azimuth detection / Doppler effect / doppler frequency‐shift / Information processing / Localization / memristive synapses / Spectrum analysis / Velocity / velocity detection