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"Dear, Hi, I just wanted to let you know that I received the CDs in the mail on Friday along with my original records! THANK YOU for the fantastic job again! Hearing this music again on CD just brought tears to my eyes ;)! I never thought I would be able to enjoy then again! I plan on sending you more stuff to transfer to CD soon as ..."

Helmholtz resonator

A resonator consisting of a cavity in a rigid structure communicating by a narrow neck or slit to the outside air. Note. The frequency of resonance is determined by the mass of air in the neck resonating in conjunction with the compliance of the air in the cavity.