Although this essential deals with acoustic measurement methods in rooms and buildings, acoustics here is not to be understood as building acoustics. In addition to conventional methods for assessing indoor climate and achieving energy-efficient air conditioning, acoustic methods can provide information useful for indoor climate design, such as:• Analyzing sound speed distributions as a source of information about temperature and flow fields in rooms,• Acoustic detection of...

Acoustic methods are indispensable in industrial monitoring. For maintenance, frequencies up to about 100 kHz are of great importance. Fundamentals and examples are presented for this purpose. The extension of methodology and technology to broadband ultrasound techniques provides new application possibilities. The reassessment of evaluation procedures makes it easier for users to interpret test results. Methods of material testing with ultrasound are not covered.