They make fancier ones that include "crackle" noises and make it more realistic.

You can place motion sensors and noise sensors inside the property. 

Save your texts and such with your tenant and your calls to the police— build a record of your neighbor’s noise.

Add compression, noise reduction, bass, EQ to your voice to make it sound real good and real crisp3.

Though one of my tenants was a struggle in May and they've also been on the line with excessive noise complaints. 

They don't bother me, but many guests freak over them.Awkward living-room layout that makes it nearly impossible to watch TV.Passageway of about 10" into dining room.Cupboard that opens on, and is only accessible from, the living room rather than the kitchen.Basement apartment = noise upstairs.

One failure shouldn't cause you to stop using them.They are available at WalMart.com now, so you could return them easier.Loud fans may hide noises, but it also means it is inefficient.

Those kinds of numbers can be a little rattling when I think about them for too long! 

Because something like a noise or parking infraction would never be committed by an owner occupant would it, has to be renter. 

But something about cold calling my first list of property owners and trying to get them to sell to me at a cheap price rattles me.