During my last round...the usual ping of my Nike driver changed subtly and lost a little of its sharpness. It's one of the original Nike Sumo drivers and I know they are well-known for the volume of the ping off the club. Is there a way for me to tell if I broke this driver and it has lost its jump?

I'm not noticing a huge decrease in performance but the sound/pitch is different. I don't see any visible cracks or damage to the club head.

Thanks.