Hello everyone!
I installed ultrasonic repellers to evict deer mice from my garage, but they’re throwing nightly parties in my toolboxes. The manual says “place 20 feet apart”, but is that for open fields or cluttered spaces? Here’s my chaos:
Ultrasonic waves reflect off hard surfaces! Space them 15 ft max in garages. Angle toward open areas. @MouseMaster, ever test this?
Your metal shelf is blocking the waves! Mount repellers waist-high on walls, mice hate vibrations near their routes. @SonicSkeptic, 15 ft works but add peppermint balls too!
In my barn, 30 ft apart works… but only with solar-powered repellers. Garage clutter? Try 10 ft.
I hacked mine to pulse random frequencies. Mice fled in 2 days.
My husky howls when repellers are <20 ft from the house. Moved them to far shed, mice followed! @RuralWarrior, solar repellers worth the $$$?
Mice adapt to any sound after a week! Rotate repellers with strobe lights.
@RuralWarrior, bought 2 extra repellers, garage now looks like a sci-fi movie set.
@EcoMouse, strobe lights made me dizzy… but mice left!
@ParanoidDogMom Solar repellers saved my barn but need direct sun.
@SonicSkeptic, sci-fi garage goals achieved. Now if only mice hated LED lights…
A good starting radius is about 15–20 feet for an ultrasonic emitter in open space. Any walls or clutter reduce that range drastically.
I placed mine at the center of a small basement floor. I think concentric coverage works better than lining along walls only.
@RodentRadarRick Interesting. After installing mine 10 feet outside a doorway, I still caught mice right inside. I think distance alone isn’t enough.
In my garage, I found that placing the device about 5 ft above ground, angled downwards, improves coverage of floor zones where mice run.
Don’t forget about overlapping zones—if you have multiple devices covering 10–15 ft circles, they connect gaps better than one giant emitter.
Big caveat: ultrasonic doesn’t go through solid surfaces. If there’s shelving, boxes, or insulation in the way, the effective range shrinks a lot.
I used three repellers in a triangle formation around my work shed, 12 ft between each. It reduced dragging sound in the walls after a week.
I wonder if mice avoid the sound entirely or just move around it. Knowing common pathways helps—put devices near observed runs rather than in the middle of empty floor.
@SoundFenceSara You make a good point. In my old workshop, a single unit at center failed once crates blocked the path. Repositioned to open view and saw better effect.