I can hear the sound of traffic at his end.

There were no sounds of traffic, which could usually be heard from here.

She could hear sounds of traffic, but it was far away.

I could hear the sound of traffic on nearby streets.

She could hear the sounds of traffic, so he must be using his cell phone.

The sounds of traffic came from a distance, but here there was nothing.

As the sound of traffic disappears behind us, I know we're close.

I listened, and heard the sound of traffic off in the distance.

I guessed, from the sound of traffic, that we were in the city.

Along with the sounds of traffic outside, she judged they were still in the city.