Seminars in Hearing Research

Date: Thursday, October 23, 2025

Location: Nelson Hall, Room 1215

Time: 12:00-1:00pm

Speaker:Junfei Li, Assistant Professor, Mechanical Engineering

Title: Unlocking the Potential for Engineered Acoustic Structures: From Enhanced Consumer Audio to Noise Mitigation

Abstract: Controlling acoustic waves is critical in many fields, including verbal communication, medical imaging, structural health monitoring, ocean exploration, and national security. Engineered acoustic structures, also known as acoustic metamaterials, are artificially designed structures that can control the behavior of sound waves by manipulating the effective material properties of the structure. In recent years, these structures have been proposed as a promising approach to wave control, but their power efficiency and frequency range have often been limiting factors for consumer audio applications. In this talk, I will present a series of my works on how to achieve 100% power efficiency in arbitrary wavefront control using engineered acoustic structures. When combined with optimization, I will show our recent success in efficiently controlling the acoustic radiation within an ultra-broad bandwidth from 1kHz to 10kHz. I will also show our recent work on noise control and efficient energy harvesting.

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The working schedule is available here: https://purdue.edu/TPAN/hearing/shrp_schedule

The titles and abstracts of the talks will be added here: https://purdue.edu/TPAN/hearing/shrp_abstracts