Sails Chong recorded the sounds of camera 18 camera shutters. With the vast majority of the population switching to cellphone cameras - that is a sound that will be heard less and less.
For those of us born before 1990 the comforting click of a camera shutter let us know that a moment was captured. It was committed to a physical medium. It will be printed. You will be able to look at that physical, printed moment of time no matter if you cell phone dies, backed it up to that remote hard drive and uploaded it to the cloud (I really hate that term) for sharing.
Curious that the most iconic shutter sound of them all - the Leica - is not represented here.