Levels and Metering - Analog v/s Digital. Humidity (Hygrometer Reading) for Condenser Microphone (in cabinet).Why no audio being played through MOTU 8pre USB even though the meters on Logic and iTunes are blazing.0 dBFS represents the biggest possible number before you run out of numbers and get digital clipping. In the computer, we are measuring numbers from 0 to 65,535 in 16 bit audio, and 0 to 16,777,215 is 24 bit. As Cheese said, 0 dB here is very different that 0 dB SPL, since we are measuring different things. The dB in your computer's meters is known as dB DFS or just dB FS for Digital Full Scale. There are other types of dB for other quantities (not just air pressure, but the magnitude of one voltage level to another for example), for other media (not just air, but voltage in a wire for example), and for other reference levels besides the 20 mirco Pascals used to calculate dB SPL. This is only one type of dB, and it is called the dB SPL for Sound Pressure Level. The human ear has a very large range of air pressures that it can withstand, and this translates to a very large set of numbers to deal with, so we use the log scale to compress these extreme values into something more manageable. When I say that something is '100 dB', that means it's 100 dB louder than the quietest thing we can hear, which is 0 dB, or 20 micro Pascals (the Pascal is a unit of air pressure). Once again i do apologize since this might be very basic when it comes most board members.any explanation would be helpful.ĭecibels are a ratio of one thing to another, that is, a way of comparing the sizes of things. So then shouldnt the meters start from 0db,8db,16db etc. Why are these negative if the threshold of hearing starts from 0db and upwards. Also the meter in wavelab and most meters display number like -48,-40,-32,-24,-16,-8, 0 db. I apologize in advance for such a stupid question. This is what confuses me as to if 0db is the 'threshold of hearing' then how 0db be the maximum limit in digital audio. I came up on a article where it was mentioned that 0db is the 'threshold of hearing' and then later in the same article it was mentioned that digital audio has a limit of 0db. I have been reading and trying to understand how meters work. I am confused about the decibel scale that is used on meters.
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