Sound Machine Sounds Good
This Marpac 580A does a nice job of substituting for the fan noise I am used to during Summer.  Although this model is only one speed the volume of the noise can be adjusted through both the top and the side.  It doesn't block out my wife's snoring and it doesn't blow away the dog's gas but I guess no product is perfect.  I am pleased with the Marpac 580A.
Rating: 5 stars