Football for e.g. world competition, has electronic chip to detect change of pressure and impact due to contact of player with ball, and ear phone with transmitter that signals information such as pressure change and impact to umpires ear

摘要

The football has an electronic chip, transceiver, and an earphone installed at the ear of a line umpire. The chip is programmed to detect the change of pressure and impact due to the contact of a player (8) with the ball. The ear phone has a receiver in direct connection with the ball, and a transmitter signaling information such as pressure change and impact transmitted from the ball to the ear of the umpire through beep sound.