For the clapper and coil pair in the buzzer example, either alternative lifting and releasing function, or remaining in the released state is deducible.
A small red light and buzzer mounted above the centre of the screen were used to centre infants' attention between trials.
In order to stop the buzzer they had to move their eyes to the left.
Finally, the controller can drive a buzzer to generate signals during operation and in error conditions.
In fact, it is possible to induce terrors by external stimulation, such as sounding a buzzer.
The light and buzzer were used to attract infants' attention between trials when necessary.
A red light and buzzer mounted between the monitors were used to centre infants' attention between trials.
A buzzer sounded when they had not looked to the left for fifteen seconds.
