Actually the sound of your shutter regardless of age or type is important as it will often be the first clue that the shutter is becoming faulty. In addition with leaf shutters the sound is an accurate way of measuring slow shutter speed and again these tend to be the first to malfunction and slow or drag.
Originally Posted by jbaphoto
These are MP3's of three shutters at increasingly faster shutter speeds used in Audacity (or Sound Forge) to measure the slower speeds. These are the speeds I use most.
Copal #0 (1990's)
Ilex Acme #3 (1950's)
Compur #0 (1931)