zumbar
intransitive verb
1 (sonar) [+insecto] to buzz; [+máquina] to hum; whirr; [+oídos] to ring; buzz
zumbarle a algn los oídos: me zumban los oídos my ears are ringing; I have a buzzing in my ears; le estarán zumbando los oídos his ears must be burning