Snicko and HotSpot: How Cricket Detects Edges
How UltraEdge (Snicko) and HotSpot technology detect whether the ball has edged the bat in cricket DRS reviews.
Snicko and HotSpot are two cricket technologies designed to detect whether the ball made contact with the bat or pad — among the most contested decisions in cricket, particularly for caught-behind and LBW reviews.
How UltraEdge Works
UltraEdge (the modern version of Snicko) captures audio waveform data synced to slow-motion video. When the ball passes the bat, any edge creates a distinct spike in the audio waveform, displayed in real time alongside frame-by-frame video.
How HotSpot Works
HotSpot uses infrared cameras to detect heat created by friction. When the ball hits bat or pad, friction generates a brief heat trace visible on thermal imaging. The challenge is the trace fades quickly and thin edges may not show.
Limitations
HotSpot requires expensive infrared cameras not all venues can provide. Snicko audio interpretation can be subjective near the threshold of detection. Controversies arise when technologies disagree or when marginal readings are used.
Impact on DRS
These technologies transformed caught-behind reviews. Previously undetectable thin edges now often show up clearly. Teams use DRS strategically for edge decisions knowing these tools provide certainty on many caught-behind appeals.
Frequently asked questions
What is UltraEdge in cricket DRS?
UltraEdge (Snicko) displays an audio waveform synced to slow-motion video, revealing whether the ball made contact with the bat through distinctive sound spikes.
Is HotSpot available in all cricket matches?
No — HotSpot requires expensive infrared cameras that not all cricket venues have, making it unavailable for some DRS reviews in certain countries.