What is the average rate of speed at which sound travels through air, measured at sea level and 70F/20C degrees?

The average rate of speed at which sound travels through air at sea level and at a temperature of 70°F (20°C) is approximately 1128 feet per second, which is equivalent to about 343 meters per second. This speed is influenced by several factors, with temperature being a significant one; as the temperature increases, the speed of sound also increases due to the greater energy of the air molecules, which enhances their ability to transmit sound waves.

In standard atmospheric conditions at sea level, the accepted value for the speed of sound is around 1129 feet per second, and this matches closely with the provided choice. The specific figure of 1128 feet per second aligns with common references used in the field of acoustics and audio-visual technology. Understanding this speed is crucial for various applications in audio and sound design, as it helps in calculating timing and synchronization in systems that rely on sound propagation.