To sound loudly and somewhat harshly.

To cause to sound like the blare of a trumpet; to proclaim loudly.

The harsh noise of a trumpet; a loud and somewhat harsh noise, like the blast of a trumpet; a roar or bellowing.

a loud harsh or strident noise

make a strident sound; "She tended to blast when speaking into a microphone"

make a loud noise; "The horns of the taxis blared"