NPRs Ina Jaffe on the National Hearing Test: http://www.npr.org/sections/health-shots/2015/12/21/459397027/is-everybody-mumbling-try-a-hearing-test-you-take-on-the-phone This test not unlike most of our “pick the signal out of the noise” experiences. David A., KC0XT, Los Angeles David Ahrendts davidahrendts at me.com