A Novel Method For Obtaining Diffuse Field Measurements For Microphone Calibration

NOVELTY OF THE DEMO: Is it possible to obtain a diffused field response of a microphone array and perform calibration in under a minute? If such a method exists, is it possible to achieve an accuracy of half a dB from the expected response? The answer to both questions is “yes”. We will demonstrate a novel, straightforward, and cost-effective method of obtaining diffuse field measurements for microphone calibration. TECHNICAL CONTENTS: This demo is associated with an accepted paper at ICASSP 2020. The paper describing the proposed method entitled “A novel method for obtaining diffuse field measurements for microphone calibration” has been accepted for presentation in a lecture session. As such, this demo will be of high-interest to the attendees of ICASSP and will significantly improve the quality of presentation of the accepted paper. Technical details of the proposed method will be easily available to the ICASSP attendees in the form of the accepted paper. HARDWARE AND INTERACTIVE DEMO SETUP: We will setup a 1.8m diameter 26-speaker rhombic tricontrahedron array and calibrate a higher-order microphone array using the proposed method. Participants at ICASSP will be invited to calibrate a microphone array using the hardware setup and the frequency response of the microphone array will be displayed on a laptop screen. A Participant will be able to see the result of his/her trial and also see a comparison between their results with those obtained by other participants. The demo will include a 1-2 minute talk describing the proposed method and its novel aspects. VIDEOS ASSOCIATED WITH THE DEMO: •A 26-speaker rhombic tricontrahedron array will be used in the demo https://vimeo.com/361493511 •Videos demonstrating the proposed method https://vimeo.com/367536785 https://vimeo.com/367536766