If you live near downtown Seattle, you may have recently heard a long, low horn reverberating through the soupy nighttime air. It happens every once in a while and has some Seattleites mystified.

The Easter weekend may not have started in the most relaxing way for some as they were awoken in the early hours of this morning. From approximately 5.30am a loud and deep foghorn could be heard ...

If you've been along the Detroit River the last few days, you've likely heard the sound of a foghorn blasting out. Those deep sounds are a language for those on the water, relaying important messages.