indicator-sound software package provides System sound indicator., you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install indicator-sound
indicator-sound is installed in your system.
Make ensure the indicator-sound package were installed using the commands given below,
$ sudo dpkg-query -l | grep indicator-sound *
You will get with indicator-sound package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Sound |
| Package | indicator-sound |
| Version | 12.10.2+14.04.20140401-0ubuntu |
| Description | System sound indicator. |
| Sub Section | Sound |