Description: sound effect of single truck passing by at high speed.

Description: high quality audio of a dump truck dumping gravel.

Description: sound effect of a locomotive train passing by.

Description: sound effect of a locomotive train passing by.

Description: high quality stereo recording of multiple helicopters hovering overhead.

Description: high quality recording of a pentagon helicopter flying over neighborhoods with birds chirping near the end.

Description: a high quality stereo recording of a helicopter above.