Why do digital cameras have shutter sound?

Digital cameras, particularly DSLRs, produce a shutter sound primarily due to their mechanical components. Here's why:

DSLR Cameras

• Mechanical Shutter and Mirror: DSLRs use a mechanical shutter and a mirror system. When you take a picture, the mirror flips up to allow light to reach the sensor, and then it flips back down after the exposure. This mirror movement, along with the shutter opening and closing, creates the clicking sound12.
• Purpose of the Sound: While the sound is inherent to the mechanical operation, it also serves as an auditory cue that a photo has been taken.

Mirrorless Cameras

• Mechanical vs. Electronic Shutter: Some mirrorless cameras also use a mechanical shutter, which can produce a similar sound to DSLRs, though generally softer. However, many mirrorless cameras use an electronic shutter, which is silent because it has no moving parts15.
• Simulated Shutter Sound: Some mirrorless cameras and other digital devices may play a simulated shutter sound to mimic the experience of using a DSLR. This sound can often be turned off in settings34.

Simulated Sounds in Other Devices

• Phone Cameras: Phone cameras often play a simulated shutter sound to provide a familiar auditory cue, even though they don't have a mechanical shutter. This sound can usually be turned off4.