Answer:

audible

AnswerCrossword Clue
AUDIBLEOut loud
AUDIBLEEasily heard
AUDIBLELine of scrimmage call
AUDIBLEWithin earshot
AUDIBLEIn sonic range
AUDIBLELoud enough
AUDIBLEToo loud for an aside.
AUDIBLEAble to be heard.
AUDIBLELoud enough to hear
AUDIBLESufficiently loud
AUDIBLENot silent
AUDIBLEQuarterback's call
AUDIBLELast-second play change