It’s not the air pressure reduction that’s my concern with a Jodi-Vac. It’s the vibration of the pump transmitted down the tubing to the cannula tip that I think might be a problem. If one puts the canula tip against the back of one’s fingernail, one can feel a decided vibration transmitted from the suction tip to the fingernail. My worry is that I’ve literally been vibrating my HA’s apart with the suction tip. I’m still using the Jodi-Vac but rather than firmly pressing it against the top of the microphone openings, I’m lightly skimming over the openings in hopes of transmitting minimal vibration to the HA body at the point of contact. The thing that’s different about my use vs. a HCP’s use is that I’m vacuuming everyday and in the past, I was pressing the tip very firmly against the outer part of each microphone opening.
Given microcircuitry with dimensions in nanometers, I’m always amazed that smartwatches and smartphones can use serious vibration as a means of alerting the user to alarms and notifications without eventually self-destructing. Don’t know if it requires a special type of microchip construction but I would hope that HA’s are made to the same vibration-resistant standards as smartphones and smartwatches, etc. I’m suspicious that ReSound HA’s are not.