Toyota Repair: acceleration noise, solara, timing belt

Question
I have a 2000 Solara with 61K miles. I recently noticed that when  take off from a complete stop, I hear a vibrating noise from under the hood. The car doesn't drive differently while this noise is happening. And the noise will stop once I reach about 20 miles per hour.

Answer
The timing belt may be the cause of the noise, it is recommended that it's replaced every 60,000 miles, it could also be a water pump noise, noises are very hard to deal with here because I can't hear them and have to rely on your description so that's the best I can do at this time with what I have.