+The **sound barrier** is the abrupt increase in aerodynamic drag and other effects experienced by an object approaching the [Speed of Sound](/wiki/speed_of_sound). Crossing this threshold creates intense [Shock Waves](/wiki/shock_wave) that propagate as a powerful [Sonic Boom](/wiki/sonic_boom), once a major challenge in aviation.
+## See also
+- [Mach Number](/wiki/mach_number)
+- [Supersonic Flight](/wiki/supersonic_flight)
+- [Aerodynamics](/wiki/aerodynamics)
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