I had a problem with my new bluetooth headphones JBL E55BT.
When connected to my Linux PC, there was an unacceptable background noise and I could hear the audio driver switch on and off even during silent periods inside music.
Solution: The headphones have a separate volume control, which can be adjusted with the buttons on the device. (This is not connected to the mixer volume on the PC.) By default, that was adjusted to maximum for some reason. Turning it down and adjusting a higher volume with Pulseaudio helped to reduce the noise to an acceptable level.