What does 95 dB sound like?

Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged period of time may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.

Read more

Regarding this, what is a good signal strength for a cell phone?

-85 decibels Cell phone signal strength is measured in decibels (dBm). Signal strengths can range from approximately -30 dBm to -110 dBm. The closer that number is to 0, the stronger the cell signal. In general, anything better than -85 decibels is considered a usable signal. Is dB loud? A sound's loudness is measured in decibels (dB). Normal conversation is about 60 dB, a lawn mower is about 90 dB, and a loud rock concert is about 120 dB.

Consequently, what do negative decibels mean?

How can the decibel value be negative? Decibels are not an absolute measure of sound energy but a comparison with a reference value. A positive dB means that the sound is a few times louder than the threshold, while a negative dB means that you are a few times softer than that threshold. Subsequently, what is the 3db rule? A change of 3 dB is accepted as the smallest difference in level that is easily heard by most listeners listening to speech or music. It is a slight increase or decrease in volume. To produce a decrease of ?3 dB you need half the power, so you would reduce power from 100 watts to 50 watts.

Consequently, what is the difference between dbi and db?

The key is that dB and dBi are different units of measure (antenna gain is confusing for this reason). So, a 3dB antenna has the same gain as a 5 dBi antenna. There is no performance difference between the two antennae. It is just the way that each vendor chose to specify each antenna.