Negative sound decibels scale
![negative sound decibels scale negative sound decibels scale](https://cdn01.dailycaller.com/wp-content/uploads/2019/06/decibelchart.jpg)
As a result, when you turn the volume up on an amp, you actually decrease the amount of restriction placed the amp, which as a result plays louder. When expressing power quantities, the number of decibels is ten times the logarithm to base 10 of the ratio of two power quantities.2 That is, a change in power by a factor of 10 corresponds to a 10. For example, if you set the volume to -20dB, that means that the volume sent to the speakers will be 20dB quieter than the maximum volume allowed by the amp. There are two different scales used when expressing a ratio in decibels depending on the nature of the quantities: field, power, and root-power. The volume controller can be somewhat compared to an attenuator which limits the power of the output signal. Without this, they would always play at full power, like a power amplifier. This is why amplifiers have a volume control system. Consequently, if you connect a CD player to the amplifier with the volume set at 0dB, it will amplify the signal to its maximum power, which will be much too loud in most cases. At 120 dB, the sound pressure reaches a level that we find unpleasant or even painful. As a logarithmic scale, the dB scale is suitable for representing the sound pressure range audible to humans. Decibel is an auxiliary unit of measurement used to indicate the sound pressure level. For example, an amp with an RMS output power of 2 x 100 watts into 8 ohms, like the Yamaha MusicCast R-N803D, will deliver this power at 0dB. The most important facts summarised in decibels. On an amplifier, 0dB is the absolute value and therefore the maximum power that the amp can deliver. Through a given material, all sounds will travel at the same speed regardless of. Sound waves at 1130 ft/s travel 1 foot every 1.1 millisecond. This is based on the speed of a sound wave on a standard temperature day at 59° Fahrenheit (15° Celsius).
![negative sound decibels scale negative sound decibels scale](https://decibelpro.app/content/images/2021/10/21---Protect-Your-Hearing.jpg)
Why is the volume expressed as a negative figure?Īlthough it may be disconcerting that the volume is expressed as a negative figure, it is actually very precise and easy to understand. For simplicity’s sake, the standard speed of sound is 1130 feet/second (344 meters/second). Starting at the low end, let’s list a few quiet noises you may hear in your day-to-day life: 0-5 dB Recording studio. Human beings can hear very weak sounds at 10 dB up to the pain threshold at 140 dB. Why does your amp display a negative figure? Why does the volume increase as the value nears 0 dB? How do you change the volume scale? We will answer all of these questions in this article. The easiest way to explain decibels is to explain how sounds compare to other sounds.