Q. WHAT IS THE RANGE OF SPEECH FREQUENCY? 500Hz-3,000Hz Q. WHAT IS FLETCHER INDEX? Average hearing threshold at 500, 1000 and 2000 Hz is called Fletcher index. Q. WHAT IS
Q. WHAT IS THE RANGE OF SPEECH FREQUENCY? 500Hz-3,000Hz Q. WHAT IS FLETCHER INDEX? Average hearing threshold at 500, 1000 and 2000 Hz is called Fletcher index. Q. WHAT IS