Here is a document we have at our information desk for those who have questions about volume levels at Northridge Church.
Volume Levels and Hearing Safety @ Northridge Church
Introduction
Thanks for your questions and comments about Northridge Church's choices on sound volume levels during our church services. We knew that entering our new building with the new sound system, we would likely receive questions, thoughts, and suggestions. We take any questions about the safety of our volume levels extremely seriously and are continuously evaluating what will serve our congregation most effectively in the long run.
Standards of SafetyBecause the pastors and staff of Northridge are not scientific experts, we are thankful that the US government has done much research in the area of hearing safety. The government's Occupational Safety and Health Administration (OSHA) has researched and published its recommended sound levels for employees.
You can find their chart of safe sound levels by clicking HERE.
To summarize the article, OSHA standards for permissible sound levels, given various lengths of time are the following:
15 minutes per day - 115 dBA
30 minutes per day - 110 dBA
1 hour per day - 105 dBA
1.5 hours per day - 102 dBA
2 hours per day - 100 dBA
3 hours per day - 97 dBA
The table goes further, but we will stop there since it is very rare that the church will ever have more than one hour of music in a particular service, let alone more than three hours.
Applying These Standards to Northridge Church
In order to adhere to these standards at Northridge, we use a sound pressure level meter to measure the volume levels. For most services, we target a sound level of 88dB to 95 dB. Only occasionally will we go beyond that level, though sometimes the levels could reach as high as 100dB.
(For a more technical explanation, ask for the document at the info desk.)
Example for Consideration
On a typical Sunday morning, you will normally experience about 20 to 25 minutes of music. At a Vertical Worship service, it may be 40 to 45 minutes of music. Let's round up to one hour to be safe. That person can listen to music at 105 dB without concern for hearing damage. The normal maximum level of 95dB is well below that threshold.
Safety, Comfort, and Preference
Finally, we must acknowledge that even within the range of safe sound volume, various people will have strong volume preferences. Scientific findings will not necessarily make it easier for people to enjoy sound levels that are higher than they desire. And we know that Northridge's historic sound level is much lower than current goals.
The sound engineer is responsible to ensure that the sound levels do not exceed safety standards. However, within those guidelines, Jeff Mapes and Mark Nelson work with the sound crew to choose the levels on Sunday mornings, as the sound engineer changes from week to week. If you have concerns about a specific meeting you have attended or will attend, please contact Jeff Mapes, Mark Nelson, or David Whiting. One of them should be able to tell you the dB level used at that service.
We also know even within the OSHA guidelines there are some who have extra sensitive hearing. And it could cause a level of physical discomfort due to certain sounds or the overall volume. If this is your experience, please know that we are very sorry for the discomfort. The discomfort does not necessarily mean that your hearing is being damaged.
What we have most often discovered is that one's personal preference for musical styles affects their appreciation of the volume level. One might love a domineering, body-shaking pipe organ at 100dB, but be irritated by a worship band at 95dB. Because of that, we encourage the use of earplugs, and will offer a supply of them at the information desk.
In Conclusion
As we told the church when we moved into the new building, it will take us six months to work out sound issues, and we continue to experiment to find what is working best for us. We want the volumes appropriately loud, and will continue to work on the right mix for our building and church. Thanks for your patience! We will continue to find the right balance of appropriately "loud."
Thanks again for your comments and questions about our sound levels. We appreciate your courage to bring your thoughts to our attention, and we hope that your concerns have been addressed here. If you have any more questions at all, please feel free to contact Jeff Mapes, Mark Nelson, or David Whiting.
* This document is based on a similar document used by Covenant Life Church; we thank them for their permission to use its contents.