Buzzing noise when brakes are applied???

[1BADT]

Just recently when I apply my brakes I will here a buzzing noise for a short time. The brakes feel fine so what could this be? How can I fix this? Any help is appreciated, THANKS...

 

[boostx]

the bussing noize could be your power master pump running when the brakes is applied

 

[Buick T]

That was the start to mine failing. It got worse over time and then they just about didn't work at all. That was back in the 80's and I dropped around 800 to replace it all. Do some searches and look at gnttype for ideas. But it could just be getting older and noisy. Could keep on going.