NASA's robot has demonstrated that both of its microphones and several on-board cameras work, and has used them extensively.
High-resolution photos of the surface of Mars have also shown Perseverance's tracks in the landscape after the rover drove for the first time on March 4.
In addition, the latest audio clips released by rover include the sounds of its wheels and internal mechanisms as it drives along the surface of the red planet. NASA said an engineering team is trying to work out where the scratching noise had come from. One possible explanation is that it is a result of the Martian surface interacting with the rover, but it could also be electromagnetic interference.
Vandi Verma, a senior engineer and rover driver at NASA's Jet Propulsion Laboratory , said:"A lot of people, when they see the images, don't appreciate that the wheels are metal. When you're driving with these wheels on rocks, it's actually very noisy."