The in-car installed bazuka style speakers are so loud in low range because the car itself works as a sound resonator (sound amplifier) for them. That's why the low pitch musical instruments are large or huge in size.

The ship horns are using the low pitch sound because it delivers more energy to work over longer range in heavyweight fog air. They have enough energy to move the vapor which always stays above the water surface.

But in the woods the long (low pitch) sound waves will be muffled by the dense trees and vegetation immediately even if you have the line of sight with the listener. The high pitch sound, in opposite, will go through much farther. It's also reflects from the natural surfaces much better.

Just elementary physics.