Hiba al-adhami  

your question about the bulk modulus for air can be answered rather straight  1.42×105 Pa (adiabatic bulk modulus) or 1.01×105 Pa (constant temperature bulk modulus). Regarding the damping properties more Information is needed about what you are looking for (mechanical, accoustic)?

Hi

This link contains some data

http://www.sfu.ca/sonic-studio/handbook/Sound_Propagation.html

and a reference to

Cyril Harris, "Absorption of Sound in Air versus Humidity and Temperature," Journal of the Acoustical Society of America, 40, p. 148.

As you can see, humidity and temperature influences damping in air.

Sincerely

Claes

A material with a bulk modulus of 35 GPa loses one percent of its volume when subjected to an external pressure of 0.35 GPa (~3500 bar).

Approximate bulk modulus (K) for substances-

1.42×105 Pa (adiabatic bulk modulus)

1.01×105 Pa (constant temperature bulk modulus)

see attached link and file as well.

Regards

https://en.wikipedia.org/wiki/File:SpiderGraph_BulkModulus.gif