Scientists have developed an optical method for remotely measuring sound pressure inside a fully anechoic chamber which is the first to provide direct traceability to the SI base units. Scientists at ...

When specifying cooling equipment, engineers are faced with myriad decisions affecting performance and layout. One critical consideration is the noise emitted. As population density rises in major ...

Nuclear physicists proposed a method to measure the speed of sound characterizing matter created in nuclear collisions. Heavy nuclei consist of hundreds of protons and neutrons (belonging to a group ...

Despite the threat of overfishing in many fish populations, fisheries managers often lack accurate plans and quota systems to allow a sustainable harvest. Traditional methods of estimating fish ...

Foresters and researchers are using sound to look inside living trees. A new study presents methods for use of sonic tomography, which measures wood decay by sending sound waves through tree trunks.

NPL has developed the first method for remotely measuring free-field sound pressure with direct traceability to fundamental SI base units for acoustic frequencies up to 20 kHz Scientists at the ...