You&#x27;d be amazed how far human sounds travel.<p>I grew up a 45 minute drive (~20 miles) from the nearest stoplight.  The town that had the stoplight also had a train.  I could hear it whenever the wind was out of the north and wasn&#x27;t too strong (and almost always hear its whistle).<p>We were also about 6-7 miles from the interstate &quot;as-the-crow-flies&quot; (about 10mi driving distance).  I could hear constant interstate traffic most of the time.<p>Note that both of those were faint, but they were definitely there.