i can relate to this. unkown or irritating sounds make me go nuts full on. i use music for example techno or monotonous sounds to blend them out. this works quite well for me it would be hard to imagine it is a friendly noise but in an extreme case it might work but blending is easier.
well, i've heard there was a Chinese torture when person had to listen to the sound of dripping water, it was really driving people crazy...