Final answer:
The input device for Speech Recognition Systems is a microphone.
Step-by-step explanation:
The input device for Speech Recognition Systems is a microphone. A microphone is used to capture the user's voice and convert it into digital signals that can be processed by the speech recognition software. There are different types of microphones that can be used, such as wireless body microphones, hand-held microphones, or even the microphone built into a smartphone.