**6. Acknowledgements**

I am thankful to Ms. Sandra Bakic, Publishing Process Manager, InTech - Open Access Publisher, for the invitation, chapter proposal and continuous cooperation. I am also thankful to each and everybody of the InTech family whoever involved for extending cooperation. Lastly, I gratefully recognize the Intech Editorial Board for giving me this rare opportunity to publish this chapter in the book "Acoustic Waves – From Microdevices to Helioseismology" without any article processing charge.

### **7. References**


**Part 2** 

**Acoustic Waves as Investigative Tools**

