We have used a white noise machine in my son’s room since he was a baby. In fact, he asks for his machine on before bed. I love this noise machine because of the easy portability, and it is rechargeable. It is perfect for in the car or when traveling. I have found that continuing to use a noise machine while we are away from home helps my son sleep and feel comfortable when away from home. I love the 36 sound options and various volume settings. The rechargeable battery is USB compatible which is awesome for travel. I can even recharge it in the car if necessary.  The machine can either run all night (battery will last) or shut off in 30, 60, 120 minutes. I feel strongly that the use of a sound machine not only masks noises but improves the quality of sleep for my son. I highly recommend this product.