The Total Harmonic Discussion / the THD Podcast.  A weekly discussion on  audio and headphone technologies and the people who bring the  technology to market.  In episode 1, we look at how to read an active  noise cancelling (ANC) curve on a headphone test system.  What to look  for on the ANC measurement curves from an R&D, product sourcing,  benchmarking, and other roles in the audio manufacturing supply chain.