I certainly hear music – I know that its music, it sounds different to random noise. I can hear the rhythm (to an extent), the lyrics of course, and many other properties (loud/soft, fast/slow etc.) I can hear that some notes are higher/lower than others. I enjoy singing songs in the car, and tend to remember lyrics all the way through, which makes me wonder, how would a hearing impaired person relate to music?
Music is a universal language. Music has an ability to communicate and be expressive. However, describing music to someone who is deaf is not easy. The way that I would do it is through emotion, beat and touch.
Throughout your home you may have a variety of tools to use, that will give an impression of the ‘tones’ you wish to convey. Velvet could emulate soft tone, whereas, running your hand across some corduroy or sandpaper could be for a sharper sound. Volume could be shown by using glass jars and water. Lower sounds when the glass is empty, loud when the glass is full. A crescendo could be visualized with pouring water at speed to fill the glass.
Another way could be by choosing a piece of music that you know well, gather together appropriate items and ask the hearing impaired person to lay one hand on the speaker to feel the beats, and then offer the tools to simulate the sounds. The best way to describe is through experience, and you can give just that.