1997 Toyota Tamaraw

Suspension problem
1997 Toyota Tamaraw Two Wheel Drive Manual 243432 miles

while driving there is a humming sound, specially when I already running at a 60 kph or up. The sound gets louder when all the car windows are closed. Some mechanics I asked told me its in the auxilliary bearing, but I want to make sure first. I just want to know if you have a encountered the same problem and what is your solution. Thank you very much.