Improving Communication Devices Practice Test

Read how Chen improved his drum code. Original: 3 fast taps meant “stop.” Test showed one worker near a loud saw could not hear the drum because the saw was too loud. Chen added a tall pole with a red flag and waved it with 3 taps. New test: all workers saw the red flag and stopped. What did Chen learn from testing that led to improvement?

Read how Chen improved his drum code. Original device: 3 fast taps meant “stop.” Test showed one worker near a loud saw could not hear the drum. Problem: the drum sound was covered by noise. Chen added a red flag on a tall pole and waved it with 3 taps. New test: all workers saw the flag and stopped. What did Chen learn from testing that led to improvement?