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• n  3 to 30 megahertz
• n  a pitch that is perceived as above other pitches

• HF
• high pitch

• low_pitch

News & Articles

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• Lockheed Martin-Built MUOS Satellite Encapsulated In Launch Vehicle Payload Fairing
  Cape Canaveral AFS FL (SPX) Jul 03, 2013 The second Mobile User Objective System (MUOS) satellite built by Lockheed Martin for the U.S. Navy was encapsulated into its payload fairing yesterday. It is scheduled to launch July 19 aboard a United Launch Alliance Atlas V launch vehicle. The MUOS constellation replaces the legacy Ultra High Frequency (UHF) Follow-On system and delivers secure ...
  July 3, 2013 - Space War
• Listening to blood cells: Simple test could use sound waves for diagnosing blood-related diseases
  New research reveals that when red blood cells are hit with laser light, they produce high frequency sound waves that contain a great deal of information. Similar to the way one can hear the voices of different people and identify who they are, investigators could analyze the sound waves produced by red blood cells and recognize their shape and size. The information may aid in the development of ...
  July 2, 2013 - Science Daily