I have the same sound on my 94 accord. It used to happen only when I went over speed bumps, but know it happend any-time i hitany knid of bump. Last weekend I had my car up on a rack looking @ it and discovered my tie-rods are goint bad. You can tell this by putting you car on a jack or rack and grabbing your wheel by either side and try to wiggle it back in forth. If there is play, then the tie-rods need to be replaced.
I'm not saying that this will fix the problem, but I have the same noise, and I know that my tie-rods need to be replaced.
Hope this helps..