If you have muffs you like, you can wear earbuds under them to get Bluetooth. A pair of noise canceling earbuds, worn under a good pair of attenuating earmuffs is highly effective.
Learned that courtesy of a couple of wildland helitack crew members. The hook into the intercom while in the aircraft. And occasionally someone will crank the master volume up. So, they wear the noise canceling earbuds inside their headphones to avoid the extremely loud sound hurting their ears. Plus, the earbuds knock out the rotor whack and turbine whine of the helicopters, while allowing the voices to come through.