Subsonic: meaning, definitions and examples

Etymology

• The prefix 'sub-' comes from Latin, meaning 'under' or 'below'.
• The word 'sonic' originates from the Latin word 'sonus', meaning 'sound'.
• Combined, 'subsonic' literally means 'below sound' or 'slower than sound'.

Science

• In dry air at 20 degrees Celsius, sound travels at approximately 343 meters per second, and anything slower is categorized as subsonic.
• Subsonic waves are often used in medical imaging, like ultrasounds, which travel at frequencies below the audible range.
• Engineers design aircraft to optimize performance in subsonic, transonic, and supersonic flight regimes.

Pop Culture

• In the movie 'Top Gun', fighter jets often demonstrate both subsonic and supersonic speeds, showcasing aerodynamics in action.
• The band 'Subsonic' is known for its unique mix of electronic and ambient music, creating sounds that resonate at various frequencies.
• Video games like 'Ace Combat' feature aircraft that can switch between subsonic and supersonic modes, adding a thrilling element to gameplay.

Technology

• Subsonic technologies are employed in quiet fans and other devices to reduce unwanted noise while maintaining airflow.
• In the realm of transportation, subsonic trains, such as the Shinkansen in Japan, allow for fast travel without breaking the sound barrier.
• Subsonic weapons are being researched to create quieter firearms, which would minimize sound while maximizing stealth.

History

• The development of subsonic aircraft began in the early 20th century, with designs focusing on efficient air travel without breaking the sound barrier.
• During World War II, many military aircraft operated at subsonic speeds to avoid detection by radar technologies of the time.
• The first commercial jet aircraft, the de Havilland Comet in 1952, was capable of subsonic travel across the Atlantic.