摘要 |
A method and apparatus for measuring the temperature of an environment by measuring the speed of sound or vibrational waves provided by background sound or vibration within the environment wherein the speed of the sound or vibrational waves is indicative of the temperature of the environment. The method may include measuring the frequency spectrum of sound or vibrational waves within a cavity or resonant cavity and using the obtained frequency spectrum to determine the speed of the sound or vibrational waves. |