Over the years devices have become more complex and we found ourselves needing an increasing number of artificial speech sources to simulate interfering talkers. The IAR Mouth Source was developed as a low-cost, accessible ITU-T P.51 compliant acoustic source for testing. It aims to replicate human speech directivity while being easy to manufacture and maintain. The design balances performance, manufacturability, and compliance with international standards- and while we're currently using it in some measurement setups, there is still a list of improvements desired. |
Goals: Accessible and Standards-Compliant The primary goals were:
COMSOL was used to model the front volume and opening geometry, which significantly affect nearfield acoustic performance |