The B A S U eAlarm will give off a sound at 120dB, and the eAlarm+ will produce a sound at 130dB. The difference in range is due to the original use for each product; the eAlarm+ is louder by 10 dB because it was intended for outdoor activities, such as hiking, while the eAlarm was intended for urban use, like commuting in the city. Both items do produce a significantly loud noise in order to deter crime, provide a rescue signal or intrusion alert, and repel animals.
You may have wondered what these units actually mean? What is a decibel (dB)? For your reference, we have put together some information on the decibel scale:
The decibel scale is a logarithmic scale used to meaningfully measure and express sound. 0dB is the most quiet sound a human ear can hear, and any increase in units of 3dB would represent a doubling of sound intensity or acoustic power.
Also, the relative loudness humans perceive is often subjective, and an increase of 10dB can sound twice as loud to the same person. But hearing loss or damage is not dependent upon just how loud something is; it also depends on the intensity of the sound.
Please reference this article to see how exposure to different levels of sound on the decibel scale can damage your hearing: http://www.noisehelp.com/noise-dose.html
So remember to always wear protective gear over your ears whenever you test your eAlarm or eAlarm+! It’s just as important to protect your ears and hearing as it is to test your eAlarm/eAlarm+.