8“ 110V loud work shift bell information
- 110 Volts AC, approximately 90 to 96 dB (loud enough but not painful)
- Operating range is 105 - 120, volume increases as voltage goes up
- In our experience, the 6" bell is a better value
- Surface Mount, bolts to the wall.
- Connects with simple lamp cord, extension cable, speaker wire,
- anything that can carry 110 volts for a few seconds.
- Typically 14 to 22 gauge wire.
Why does the volume vary, why is it not exact? I am not an engineer, but I have observed this:
There are two factors that affect how loud these bells ring.
1) Voltage. We have always thought that the power in the walls is 110. That is rare. Your power company does the least it can to make the system run, it is responsible to share holders first, you, the customer, second. Your lines are old. Old lines have more resistance. As they bake in the sun, freeze in the winter, and the plastic on them rots, plus the suns rays (solar energy) weakens them. So they deliver more power when they are new, then 20 years later. Quite a bit more.
In the end, you are lucky to get 105 volts. It's easy to test, buy a volt meter and stick it in a plug.
Plus, in your building, you may be drawing (using) more than the building was originally designed for. This drops voltage. So the bell is quieter.
2) What is in the building? White noise (air-floating tables for woodwork)? Boxes and fabrics? Sawing and other loud noise? It all sucks up the bell and buzzers' volume.
Actually, the 6" bell is louder, but people ask for the 8, so here it is.
This has been going on for years: People keep asking "How loud are your
bells?" Unfortunately, it's like describing a dinner at a restaurant. It depends on the environment. Is it an empty
room like a gymnasium? Does it have lots of rooms, or lots of
background noise like a woodworking shop? Is this a warehouse with lots of rows of shelving and boxes of fabric?
Bells
and buzzers all seem to max out at 102db. 102db is very loud.
110db is
extremely loud, check out the YouTube video below.
In our
experience, installing 2 to 3 bells or
buzzers is much more effective than just one. Put one by the timer,
then run wire out the another, 50 to 100' away. It won't be louder, it
will just be more likely to be heard above all the background noise.
So, yours truly did some research recently (2016), this is interesting:Using an Android phone decibel app, this is what we found:**A bedroom at night in the country, windows closed: 28 - 32 db
**A bedroom at night in the city with the windows closed: 42- 46 db
**Office environment, people chattering: 62db
**American Airlines 737 inside just behind the wing during takeoff 86db
**Same jet, landing with the reverse thrusters on: 88db
That ROAR you hear..
**Same jet, cruising for 3 hours, it's 82 to 86db. That's partially why flying is tiring.
Shop buzzer's: 102db (Edwards, the ones we sell) Other brands "hum" at 82 to 86.
Our bells test out at 98 to 103db depending on voltage
It
seems that no one offers anything louder than 103db, unless it
goes on a train, ocean liner, or fog horn. In some cases loudspeakers
are used on farms; we don't have them, but our equipment will ring
them. This is 110db, a train horn on an obnoxious person's pickup
truck. In a working environment, this would clearly cause accidents.
https://www.youtube.com/watch?v=TiWNw0A1Ijg&feature=relatedMore
bells or horns does not make it louder, it just makes it more pervasive
- easier to hear through the machinery, across the rooms, over the
land.