Here is a vector of music design background with speaker and microphone, include a eps file.

Name: Vector Music Background with Speaker and Microphone
Homepage: http://www.webdesignhot.com/
License: Creative Commons Attribution 3.0
File Type: EPS
This image is a scalable vector illustration and can be scaled to any size without loss of resolution. This image will download as a .eps or ai file. You will need a vector editor to use this file (such as Adobe Illustrator or CorelDRAW).