Q13.What do you understand by the Umpire decision review in cricket? Discuss its various components. Explain how silicon tape on the edge of a bat may fool the system.

The Umpire Decision Review System (DRS) is a technology-based system in cricket designed to enhance decision accuracy by allowing teams or umpires to review on-field decisions.

• Hot Spot: Uses infrared cameras to detect heat generated by friction from bat-ball contact.
• Snickometer/UltraEdge: Employs sensitive microphones to identify sound spikes indicative of bat-ball contact.
• Ball Tracking (Hawk-Eye/Virtual Eye): Predicts the ball's trajectory after pitching to determine if it would have hit the stumps.

Silicon tape applied to a bat's edge can absorb impact vibrations and sound. This dampens or eliminates the distinct heat signature required by Hot Spot and the sound spike detected by Snickometer. Consequently, faint edges become difficult for the review system to detect, potentially leading to incorrect 'not out' decisions. The system relies on clear physical signals (heat, sound) which silicon tape can obscure, challenging the game's integrity.

Such attempts to circumvent technology undermine fair play, necessitating continuous evolution of review systems to maintain the sport's integrity.