The Sound of an Ultrasound

Just one of MANY reasons we are choosing to forgo ultrasound this pregnancy


Human Pain Tolerance . . . 125 dB
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Prenatal Ultrasound: 100 - 120 dB
Approaching train . . . 100 - 120 dB
Sandblasting . . . 115 dB
Riveting machine . . . 110 dB
Rock band . . . 108 - 114 dB
Boeing 707 or DC-8 aircraft, 1 nautical mile (6080 ft) before landing . . . 106 dB
Jet flyover at 1000 feet . . . 103 dB
Bell J-2A helicopter at 100 ft . . . 100 dB
Boeing 737 or DC-9 aircraft, 1  nautical mile (6080 ft) before landing . . . 97 dB
Power mower . . . 96 dB
Subway train at 200 ft . . . 95 dB
Motorcycle at 25 ft . . . 90 dB