Strong immediate sound with a rich, sharp and high pitch.DOLFIN B whistle's rich, sharp, high-pitched tone reaches every corner of the court, overcoming the deafening roar of a Basketball arena. Whistle features a tough polycarbonate mouthpiece with a vertical reinforcing rib. Whistle was developed exclusively for basketball referees who need the ability to remain mobile while holding the whistle firmly in their mouth.A unique beat tone is created by the interference of two different tones measuring 4.15 kHz and 3.67 kHz. 124dB at 10cm.
