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AGENDA ITEM: VJbliC fl'lftiU't~ ...\.. <br />AUGUST 6, 2019 <br />RECEIV ~D FR ~ l).e~e bA ~ <br />ANOADE PART OF THE Rl C0 1 DATTHE <br />COUNCIL MEETING OF: t tJ aq <br />OFf.lOE OF THE CITY CLE 15._ <br />RPV CC MEETING PACKET <br />J M;\DE PART OF THE R F.:(xi~]1JTf;fii:' <br />l rJCIL MEETIN G OF : . . · <br />I; F _oF TH& CITY crEiiR'"====-- <br />.. -....... , ... --:a~~~--~!'1'~· .. ·-' <br />MONITORING NOISE DEICBEL LEVELS <br />-·---.~------·---··--·-··-~--------~ -------·-·-- <br />{ You can measure the decibel levels of any noise with a handheld Sound Meter or a Decibel Level <br />Reader. This is something that a Green Hills administrator could use to test sound emissions from <br />portable stereos and other portable noise makers, or a security guard could potentially carry to <br />monitor noise levels around the cemetery that might disturb others. A portable sound level meter can <br />be purchased on Amazon, or there are digital ones that can be downloaded to a smartphone. <br />Digital: httgs://www. hea lthy_heari ng. corn/reQort/ 4 7 805-The-best -ghone-aQQS -to-measure-noi se-l eve ls <br />Handheld from Amazon: httgs://www.amazo n.com/RISEPRO-Decibe l-rv1eter-Di g itai- <br />Sound/dg/BO·J EZ Z8 B5Q/rei=asc df 801 EZZSB50/?tag=hY-QI'O Q: <br />20&1i ni<Code=dfO&hvadid=1954 518 0 5901 &hvgos=1 o1 &iwnetw=g&hvrand=26965527 458130073-1 O&.h <br />ygone=&hvgtwo-&.hvg rnt=&hvdev=c&hvd vern d I =&hvl ocint=&hv locphy_=9 0 3 i 003 &11 vta rg id=Q ia- <br />312317797099&psc=1 <br />*NOTE: Portable Sound Meters can only test the noise level at the instrument that is emitting sound, <br />which is helpful, but doesn't take into account other acoustics & reverberation that can amplify the <br />sound as it carries across a distance and, thus, creates a disturbance/nuisance to others (even at a <br />relatively low decibel level). <br />------------------------------------------- <br />,· ;:(, ~s far as decibel levels go, sound carries quite far and typically carries upwards. Due to _ <br />reverberation off the hard, flat surfaces of the rooftop, a relatively low decibel level can travel ,-,lL w · further, causing a nuisance/disturbance, even at low volumes. Any decibel level ordinance ~ <br />~ should be weighed against reverberation of sounds that are bouncing off hard surfaces and <br />causing them to travel greater distances. Here is a helpful list of decibel levels: <br />Here are normal sounds you encounter every day as a rough <br />scale for decibel levels: <br />e 10 dB: Normal breathing <br />• 20 dB: Whispering from five feet away <br />• 30 dB: Whispering nearby <br />• 40 dB: Quiet library sounds <br />• 50 dB: Refrigerator <br />• 60 dB: Electrictoothbrush <br />o 70 dB: Washing machine <br />• 80 dB: Alarm clock