- Acoustic Material Tables - Extensive table of acoustic properties, expanded from the late Alan Selfridge's 1985 paper.
- NPL Acoustics: Calculation of Absorption of Sound by the Atmosphere - Computes the attenuation coefficient according to ISO 9613-1 as a function of frequency, temperature, humidity and pressure.
- Tables of Acoustic Properties of Materials - A number of pdf files with the ultrasonic and acoustic properties of solids, liquids, gases, plastics, rubbers, longitudinal piezoelectric and shear piezoelectric.
- Velocity of Sound in Some Biological Materials - Ultrasound physics. Parameters. Differences between X-rays and ultrasound.( Gonzalo Diaz M. M.D.)
