Vibration characteristics of a tire play an important role to judge a ride comfort ability and sound quality for a vehicle. In this study, the experimental investigation on the sound radiation of a radial tire has been examined. Based on the sound intensity techniques, the sound pressure field and the sound radiation are measured. It turns out that air pressure in tire, tread patterns, and aspect ratio of the tire governs the sound radiation characteristics. Then a numerical analysis for the tire element is conducted. During analysis, the tire element is modeled as an elastic ring. The comparison shows that the numerical output correlates to the experimental data.