Rattling noise

It is very hard to diagnose a noise that I cannot hear.
I suggest, if you already do not have one is to purchase a $10.00 android smartphone from Walmart, a Dollar Store, etc, then make an audio recording of this noise either by placing the phone on the floor near the side that is making the noise, or better yet, if the noise is coming from under the hood, maybe tape it down under the hood somewhere like the inner fender on the side you think the noise is coming from. Then post the recording in here if it is a video with audio or YouTube, then post the link to it in here so one of us can listen to it and give our opinion or diagnosis.