Right. I can do it too - I can make them click/crunch and roar - which I'm sure is due to the sound muscles make when tensed.
Squeeze your fist and hold it up to your ear. It's audible.
Squeeze your fist and hold it up to your ear. It's audible.
Partially covering the outer ear makes the flow of blood audible.
That's not tinnitus-related.
Hearing a crackling sound when you flex your ears is quite common. This noise typically results from the movement of small muscles around your ear, particularly the tensor tympani muscle in your middle ear. These muscles contract to dampen certain sounds, like chewing, but can also be voluntarily or involuntarily activated when you move your ears. This action can cause a vibration or movement of the eardrum, leading to the crackling sound. It's usually harmless, but if you experience pain, discomfort, or any other symptoms, it's advisable to consult a healthcare professional.
The clicking sound is the opening of the Eustachian tube. Flexing the tensor tympani sounds like a deep rumbling.