This is important to understand, as it helps you understand just how loud something really is when looking at dB charts. If a sound is 20 dB, that's 100 times louder than near silence. Near silence is expressed as 0 dB but a sound measured at 10 dB is actually 10 times louder. For example, every increase of 10 dB on the decibel scale is equal to a 10-fold increase in sound pressure level (SPL). This is a way of counting or measuring something that increases rapidly, or exponentially. In daily life, we often think of this as volume.ĭecibels increase exponentially 'A 10 db increase means 10 times louder, a 20 db increase means 100 times louder'ĭecibels are measured logarithmically. The more amplitude a sound has, the louder it is. Amplitude, reported on the decibel (dB) scale, measures sound's pressure or forcefulness.Health-wise, many older adults develop what's known as high-frequency hearing loss, making it harder to hear sounds that are higher pitched. A child's voice is high frequency, for example. In daily life, this corresponds to how low- or high-pitched something is. Frequency, reported in Hertz (Hz), measures the number of sound vibrations in one second.

It can be measured in two ways: frequency and amplitude. Decibels measure sound intensity (amplitude) How do we measure the intensity of the sounds they make? Behold the humble decibel, a logarithmic way of describing a ratio between things like power, sound pressure and voltage. The soft whisper of a grandchild sharing a secret, the loud blare of a fire truck's siren as it enters the intersection, the soothing melody of your favorite song on the radio.

Decibel log scale