Whisper is a free and open source audio application for Linux. Using Whisper you can listen to your microphone through your speakers and use this app for testing your microphone and also for listening to your voice via your mic. You need PulseAudio and Pipewire in your system. It is written in Python and released under GNU General Public License v3.0.
Install Whisper on Ubuntu Linux
Whisper is available as a flatpak package file from the remote flathub. First install flatpak and flathub on your system using below link.
And restart your system after the installation. Now open the terminal command-line application and run below Whisper flatpak installation command. It will install the latest version of Whisper on your system.
flatpak install flathub it.mijorus.whisper
After that open Whisper using this command.
flatpak run it.mijorus.whisper
And uninstall Whisper using below command.
sudo flatpak uninstall it.mijorus.whisper