humming pitch noise

What is your question?

Have MDX 2006. While driving, I hear a pitch noise from the dash around the steering wheel. When I take my foot off the gas the noise stops. As soon as I push the gas pedal the noise continues.The noise is similar or lesser pitch of air flow from the seal of the door or window, but that was checked and determined the noise was not coming from the seals. Another mechanic was suggesting the noise is from transmission. please help

What makes this problem better or worse?

When I am driving longer haul.

How long has your 2006 Acura MDX had this problem?

I purchased the car about 2 months ago.