Logarithms and Sounds

Larger capacity units will produce a louder sound and if you allowed your unemployed uncle to install it improperly, you may have lost sleep when the unit begins to rattle at 2:00 a.m

A Scottish mathematician named John Napier discovered logarithms in the early 17th century and the world has never been the same since. The pH scale in chemistry is logarithmic as is the well-known Richter scale used to measure seismic activity. The basis for any logarithmic scale is that an increase in one unit means a true increase that is tenfold. For example, a Richter 7 earthquake is 10 times as strong as a Richter 6 and 100 times stronger than a Richter 5 quake. The measurement of sound in decibels (dB) is one more place where logarithms are used. Total silence is 0 dB, a person breathing is 10 dB, and a loud rock concert is about 120 dB. A quiet library comes in at about 40 dB so it is no surprise that an outdoor AC compressor making a 60 dB sound will earn a stern look from the librarian. Many factors affect the sound that HVAC units make. A solidly built one will be quieter than a flimsy model. HVAC units get louder as they age. Larger capacity units will produce a louder sound and if you allowed your unemployed uncle to install it improperly, you may have lost sleep when the unit begins to rattle at 2:00 a.m. when even your kids are quiet. Manufacturers are aware that people want and need a quiet environment and have come up with innovations like variable-speed blowers, sound dampening outdoor cabinets, quieter fans, and even discharge mufflers. If your uncle installed that HVAC condenser right outside your bedroom window, you may want to call a qualified HVAC contractor to see if it can be moved to a location where the noise won’t keep you awake at night.
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