Acoustic analysis of gas mixtures

An acoustic gas analyzer comprising:

• an acoustic velocity meter disposed and adapted to interact with a gas to be analyzed by emitting acoustic energy into the gas and detecting said acoustic energy after transmission through the gas, said acoustic velocity meter emitting a first output dependent on the detected transmission of the acoustic energy through the gas;
• a temperature probe, having a probe time constant, disposed and adapted to interact with the gas to measure a temperature of the gas, and emitting a second output indicative of the measured temperature of the gas;
• a signal processor supplied with said first output for producing, from said first output, a temporally-adapted first output dependent on the probe time constant;
• and
• a calculation unit supplied with said temporally adapted first output and with said second output for determining compositional information of the gas from said temporally-adapted first output and said second output.