<p class="p1"><span class="s1">Security shutters protect your home and/or business from unwanted intruders. They are one of the best assets you could invest in. But there is one thing about them that is irritating. Noise.</span></p>
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<p class="p1"><span class="s1">The noise from your security shutters can drive you crazy. If you have kids or elders at home, the noise will make the situation worse. In your office, this noise can spoil your relationships with customers during meetings.</span></p>
<p class="p1"><span class="s1">Why do security shutters make noise? What noise level can our ears tolerate? What can we do to tackle this noise?</span></p>
<p class="p3"><span class="s1">You’ll get the answers to these questions throughout this blog. Let’s get started.</span></p>
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<p class="p4"><span class="s1">Reasons Why Security Shutters are Noisy</span></p>
<p class="p1"><span class="s2"><a href="https://rollac.com/products/rolling-shutters/residential-shutters/"><b>Residential security shutters for homes</b></a></span><span class="s1"> and commercial shutters will make some noise as they age, but there could be other reasons for the noise.</span></p>
<p class="p1"><span class="s1">Motor parts in any equipment require lubrication to work properly. When the wheels, gears, and other moving metal parts are not well-lubricated, they become noisy. Lubrication not only softens the noise, but it also makes the motor work more efficiently. Motorized shutters make noise when their parts are loose, not in their proper locations, or are corroded.</span></p>
<p class="p1"><span class="s1">Roller security shutters are constructed from roll-formed steel ‘slats’ that roll onto each other as the door opens. This creates a lot of metal on metal noise. The guides are made from bare metal, and the curtain sliding down into them also produces a loud screeching noise. The noise can also be the result of the vibration of metal against the metal of the roller shutter parts or loose rails.</span></p>
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<p class="p1"><span class="s1">There are many issues in older rollers because, over time, their slats will get stretched and cause the door to sag or ‘corkscrew’ as it rolls up. This puts an additional load on the motor and guides, making the noise louder. </span></p>
<p class="p3"><span class="s1">Larger doors will expand with direct heat and cause binding and additional friction as the door operates. This will also cause a loud screeching noise as the door opens.</span></p>
<p class="p4"><span class="s1">How Loud is Too Loud for Humans?</span></p>
<p class="p1"><span class="s1">Let’s look at some facts and figures to compare the noise levels humans perceive.</span></p>
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<ul class="ul1">
<li class="li1"><span class="s1">Breathing creates a sound of 10 decibels.</span></li>
<li class="li1"><span class="s1">Garbage disposals or drilling machines can be as loud as 80 to 85dB (twice as loud as 70dB and can cause hearing loss with 8 hours exposure).</span></li>
<li class="li1"><span class="s1">A Boeing 737 flying at 6080ft registers a noise of 97dB before landing.</span></li>
<li class="li1"><span class="s1">A motorcycle at 25ft records noise of 90dB and is four times as loud as 70dB.</span></li>
<li class="li1"><span class="s1">A riveting machine registers at 110 dB (the average human pain threshold is 16 times as loud as 70dB).</span></li>
<li class="li1"><span class="s1">A thunderclap and chain saw register at 120dB. It’s 32 times as loud as 70dB.</span></li>
<li class="li1"><span class="s1">A jet taking off at 25m registers 150dB with an effect of an eardrum rupture! </span></li>
</ul>
<p class="p5"><span class="s3">Source: <a href="http://www.industrialnoisecontrol.com/comparative-noise-examples.htm"><span class="s2">Industrial Noise Control</span></a></span></p>
<p class="p6"><span class="s1">Change in sound level and apparent loudness</span></p>
<table class="t1" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td class="td1" valign="top">
<p class="p8"><span class="s1"><b>Change in Sound level</b></span></p>
</td>
<td class="td2" valign="top">
<p class="p8"><span class="s1"><b>Change in apparent loudness</b></span></p>
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</td>
</tr>
<tr>
<td class="td3" valign="top">
<p class="p8"><span class="s1">3 decibels</span></p>
</td>
<td class="td4" valign="top">
<p class="p8"><span class="s1">just perceptible</span></p>
</td>
</tr>
<tr>
<td class="td5" valign="top">
<p class="p8"><span class="s1">5 decibels</span></p>
</td>
<td class="td6" valign="top">
<p class="p8"><span class="s1">clearly noticeable</span></p>
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</td>
</tr>
<tr>
<td class="td3" valign="top">
<p class="p8"><span class="s1">10 decibels</span></p>
</td>
<td class="td4" valign="top">
<p class="p8"><span class="s1">half as loud</span></p>
</td>
</tr>
<tr>
<td class="td5" valign="top">
<p class="p8"><span class="s1">20 decibels</span></p>
</td>
<td class="td6" valign="top">
<p class="p8"><span class="s1">much quieter</span></p>
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</td>
</tr>
</tbody>
</table>
<table class="t1" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td class="td7" valign="top">
<p class="p9"><span class="s1"><b>Noise</b></span></p>
</td>
<td class="td8" valign="top">
<p class="p9"><span class="s1"><b>Reduction in Decibels</b></span></p>
</td>
<td class="td9" valign="top">
<p class="p9"><span class="s1"><b>Predicted subjective response</b></span></p>
</td>
</tr>
<tr>
<td class="td10" valign="top">
<p class="p9"><span class="s1">City traffic (10m from the curb)</span></p>
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</td>
<td class="td11" valign="top">
<p class="p9"><span class="s1">4 decibels</span></p>
</td>
<td class="td12" valign="top">
<p class="p9"><span class="s1">just perceptible – clearly noticeable</span></p>
</td>
</tr>
<tr>
<td class="td7" valign="top">
<p class="p9"><span class="s1">Urban motorway (40m from the edge)</span></p>
</td>
<td class="td8" valign="top">
<p class="p9"><span class="s1">3 decibels</span></p>
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</td>
<td class="td9" valign="top">
<p class="p9"><span class="s1">just perceptible</span></p>
</td>
</tr>
<tr>
<td class="td7" valign="top">
<p class="p8"><span class="s1">Jet airliner flying at 300m</span></p>
</td>
<td class="td8" valign="top">
<p class="p9"><span class="s1">6 decibels</span></p>
</td>
<td class="td9" valign="top">
<p class="p8"><span class="s1">clearly noticeable</span></p>
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</td>
</tr>
<tr>
<td class="td7" valign="top">
<p class="p9"><span class="s1">Dishes being washed (kitchen)</span></p>
</td>
<td class="td8" valign="top">
<p class="p9"><span class="s1">10 decibels</span></p>
</td>
<td class="td9" valign="top">
<p class="p8"><span class="s1">perceived as half as loud</span></p>
</td>
</tr>
<tr>
<td class="td10" valign="top">
<p class="p9"><span class="s1">2 stroke whipper snippers at 7m</span></p>
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</td>
<td class="td11" valign="top">
<p class="p9"><span class="s1">7 decibels</span></p>
</td>
<td class="td12" valign="top">
<p class="p9"><span class="s1">clearly noticeable</span></p>
</td>
</tr>
<tr>
<td class="td7" valign="top">
<p class="p9"><span class="s1">2 stroke lawnmower at 7m</span></p>
</td>
<td class="td8" valign="top">
<p class="p9"><span class="s1">4 decibels</span></p>
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</td>
<td class="td9" valign="top">
<p class="p8"><span class="s1">just perceptible – clearly noticeable</span></p>
</td>
</tr>
<tr>
<td class="td7" valign="top">
<p class="p9"><span class="s1">Small dog barking at 5m</span></p>
</td>
<td class="td8" valign="top">
<p class="p9"><span class="s1">9 decibels</span></p>
</td>
<td class="td9" valign="top">
<p class="p9"><span class="s1">clearly noticeable – perceived half as loud</span></p>
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</td>
</tr>
</tbody>
</table>
<p class="p1"><span class="s1">(Source for both the tables: Roller shutters)</span></p>
<p class="p3"><span class="s1">After understanding the causes of noise and their noise levels, it’s time to learn the solution to this problem.</span></p>
<p class="p4"><span class="s1">How Can We Deal With the Noise of Security Shutters?</span></p>
<p class="p1"><span class="s1">There are many ways to fix the noise of security shutters. However, most of them require technical expertise. You can contact an authorized dealer to help you with the process.</span></p>
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<p class="p1"><span class="s1">Let’s look at some of the ways.</span></p>
<ul class="ul1">
<li class="li1"><span class="s1">Usually, intermediate slats are fitted with nylon slat clips. These keep the metal slat away from the guide and reduce noise. Check for any broken or missing pieces and replace them to reduce noise. This will also free up the operation of your door.</span></li>
<li class="li1"><span class="s1">You may check the guides for damage. Even a small dent in the guide can form a pinch point for the door travel, adding noise.</span></li>
<li class="li1"><span class="s1">Some shutters will respond to the lubrication of the guides. This can control the metal to metal wear and tear and noise. We recommend you contact your roller shutter service technician before using this technique.</span></li>
<li class="li1"><span class="s1">Check the spring tension on the door. An under-tensioned door will generate noise from the guides and motor as it operates under substantial load. Such a door is dangerous to operate.</span></li>
<li class="li3"><span class="s1">Keep an eye out for damaged slats. Sometimes, the door may have been hit and bent in the past and not properly straightened out. This causes additional friction and noise. You can easily replace the damaged slats, adding new life to an old door.</span></li>
</ul>
<p class="p4"><span class="s1">On An Ending Note</span></p>
<p class="p1"><span class="s1">Noise cannot be eliminated completely in any security shutters. Regular maintenance and good operating practices are key to reducing their wear and tear. This will ultimately reduce noise. Rollac security shutters are designed to operate while making minimum noise. You also get a good after-sales service in case of any technical problems. Buy a security shutter for your home or office today!</span></p>

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