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"I just wanted you to know the CD arrived safe and sound yesterday. This recording was made at a local radio station in Greenwood, SC, in the early 1950's. My father sang with a gospel quartet that had its own radio show at the time. This is the only known recording we have of my dad singing and I am thrill to have been able to preserve it for ..."

Acoustic resonance

An increase in sound intensity as reflected waves and direct waves combine in phase. May also be due to the natural vibration of air columns or solid bodies at a particular audio frequency.