What is causing a loud buzzing noise from under distributer cap and roter

What is your question?

Noise occurs after start engine every time engine is started. Noise has gotten louder over the past few weeks. Some loss of acceleration. Noise occurs after engine has warmed up and does not stop. Changed cap and roter no effect on noise

What makes this problem better or worse?

Warm engine ?

How long has your 1993 Chevrolet S10 had this problem?

3 weeks