Science division and the Dominion war.

[sojourner]

Or just used prosthetics.

 

[Vanyel]

or voice activated, or really big buttons on a giant keyboard.

 

[7thsealord]

Given the extraordinary range of sound a cetacean can generate and the amount of datat they can compress into just a short burst, they would probably be remarkably good with "voice-activated" tech.