The Sound of Ultra

Silly Comparison to Ultra Sound - The Sound of Ultra Versus The Sound of Music

The Sound of Music's 1965 screenplay by Ernest Lehman and collaborative book effort of Howard Lindsay and Russel Crouse was based on Maria von Trapp's autobiography. Not very ultra sound, some would argue.

Let's compare the sound of music to ultra sound.

Loudness:

• Audibly pleasing at 50 - 80 dB;
• Not as fun as a rock concert at 80 - 120 dB.

Pitch: Four octaves (Julie Andrews' vocal range).

The Sound of Ultra's 2010 prominence in medical diagnosis began around 1945 when Karl & Friederich Dussik employed ultrasound in medical diagnosis by attempting to locate brain tumors by measuring an ultrasound beam through the skull producing echo images of the ventricles of the brain recorded photographically on heat-sensitive paper. Their ultra sound experiments were based on the 1826 work by Jean-Daniel Colladon about the speed of sound under water.

Ultra Sound Loudness:

• Undetectable and harmless at medical usage of less than 0dBA.
  
• Deafening at 120+ dB;
• Harmful to human body due to heat at 155+ dB;
• Deadly at 180+ dB.

Pitch: 20,000+ hertz. (inaudible)

There you have it. Ultra sound is more useful than the sound of music, but the sound of music sounds better.

Read about ultra sound at DrSmart.com