Vancouver Island

BC, Canada

freighter sound level

 

 

 

Let’s have a look now at the related law. Noise bylaws clearly protect people from land based noise, even noise of much lower level than a ship. These laws are here to protect Canadians from distress. Let’s see what Ladysmith does to protect its citizens from noise. Let me quote “Bylaw 1478: A Bylaw for the Abatement and Control of Noise in the town of Ladysmith”:

“a) The Council is of the opinion that the operation of a heat pump or water pump resulting in a sound level in excess of 50 decibels between 7 am and 10 pm the following day, or in excess of 45 db between 10pm and 7 am of the following day is objectionable . b) No person shall emit or cause, suffer, or permit the emission of sound from the operation of a heat pump or water pump in a quiet zone resulting in a sound level at a point of reception located in a Quiet Zone [my insert: residential] in excess of: i. 50 decibels between 7 am and 10 pm, or ii. 45 decibels between 10pm and 7 am the following day.

There we are: we have laws to protect us from 45 and 50 db (running Continuously) What is 45 db? Let’s see.. “Library, bird calls (44 dB); lowest limit of urban ambient sound’. So, people in the *town* of Ladysmith a re protected from anything louder than the lowest level of urban ambient sound, but if you live on the water it’s fine to bombard you with “Passenger car at 65 mph at 25 ft (77 dB); freeway at 50 ft from pavement edge 10 a.m. (76 dB). Living room music (76 dB)” 24 hours a day for weeks on end? I think not. These are facts.

As soon as the sound is over land it is attenuated very quickly. Try living up close: we are measuring 70 db very often. I have seen 75. If those numbers mean not much to you (as you can only compare to a heat pump), you might want to have a look at see what 70 DB actually is. let me quote:”Passenger car at 65 mph at 25 ft (77 dB); freeway at 50 ft from pavement edge 10 a.m. (76 dB). Living room music (76 dB); radio or TV-audio, vacuum cleaner (70 dB). Arbitrary base of comparison. Upper 70s are annoyingly loud. I have got 75 db myself. Kay reports 80 DB.

no freighters in Salish Sea