jnoisemeter software package provides audio test signals meter, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install jnoisemeter
jnoisemeter is installed in your system.
Make ensure the jnoisemeter package were installed using the commands given below,
$ sudo dpkg-query -l | grep jnoisemeter *
You will get with jnoisemeter package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Sound |
| Package | jnoisemeter |
| Version | 0.1.0-1 |
| Description | audio test signals meter |
| Sub Section | Sound |