This invention is a wearable device that masks and/or cancels annoying ambient sounds to help a person sleep. It includes a soft and stretchable member, such as a headband or hat, that contains one or more sound-conducting tubes. Sound that is emitted from the one or more tubes helps to mask and/or cancel annoying ambient sounds. Advantages of this device over prior art include: no speakers or other rigid components over a person's ears that can be uncomfortable or unsafe when the person sleeps on their side; a relatively wide sound-emitting area to accommodate different size and shape heads; and a stretchable wearable member that gently clings to the person's head to avoid having sound-emitting areas shift away from the person's ears as they toss and turn in their sleep.