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Ralphonsicus
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Thanks.
Ralphonsicus said:Thanks.
Ralphonsicus said:Thanks.
sophiecentaur said:Shame he breaks the first rule at the start. dB is a ratio of powers so he isn't helping by starting off with Voltage ratios. I am not nitpicking here and his approach can lead to serious misconceptions. Too glib and chatty to be safe, imo.
Kholdstare said:Well power = voltage^2 / resistance , isn't it? So even if dB is actually a rule which applies for power, we can use it for voltage also given the load remains same (which is most of the case).
Decibels (dB) are a unit of measurement used to express the relative intensity or loudness of a sound or signal. It is a logarithmic scale, meaning that a small change in decibel level represents a large change in actual sound intensity.
The decibel scale is calculated by taking the logarithm of the ratio between two quantities. In the case of sound, it is the ratio between the sound pressure level (SPL) and a reference level of 0 decibels, which is considered the threshold of human hearing.
Yes, there are several formulae that involve decibels. One of the most common is the formula for sound pressure level (SPL), which is: SPL (dB) = 20 log (p/p0), where p is the sound pressure and p0 is the reference pressure of 20 microPascals.
Decibels are commonly used in acoustics to measure and describe the loudness of sound. They are also used in the design and evaluation of acoustic systems, such as in the construction of concert halls or noise control in buildings.
No, decibels and hertz are not the same. Hertz (Hz) is a unit of frequency, while decibels are a unit of sound intensity. They are related, as a change in frequency can result in a change in sound intensity, but they are not interchangeable units.