Many hospitals encourage small radios in ICU to help with healing. ICU's tend to be sterile places and all business and music can be a much needed sensory stimulation. Where I worked we turned the TV on in the daytime and off at bedtime even if a patient did not seem to be aware. The family usually would set the station to what the patient liked. It helps with the long term effects of being in a place where you can't tell if it is night or day. Ask his nurses if its ok. It probably will be.