![]() ![]() To have a microscopic insight into melodic contours, to see the precise pitch of a given note, to have precise measurements of the duration of beats – they are all impossible without such a program. First because it enables us to do certain types of analysis that cannot be done by the ear and the brain. PRAAT is made for linguistics, but it works well for certain types of music analysis. At present I consider PRAAT the best program, although there are others. ![]() Bel’s MMA in Bombay and my own PitchXtractor for the original Macintosh are examples. From the 80s onward computers have been increasingly used for music analysis. A major breakthrough was Seeger’s melograph in the 1950’s. Percy Grainger had pointed out the need for advanced technological tools for analysing music in the early 20 th century. PART 3: Advanced work on melodic contours.PART 1: Basics of working with melodic contours.group – Professional Organization of English Majors. *I am obviously just teasing those of you, like my #1 daughter who can legally join the P.O.E.M. Might I suggest you spend just a couple of minutes and try your new -found skill on the following quiz? After just a bit of practice, you’ll have decibel math down cold! Just be sure to follow Rule #1 – and keep decibel numbers always on the left, and then apply the conversions of Rule #2 to get the converted numbers on the right. With the appropriate use of adding and subtracting Tens and Threes, you can get to any number you wish. So you can get the answer to this one by saying you have TWO tens, and 17 is 20 MINUS three… so the left side would look like this: “10dB+10dB-3dB” – and the resultant application of Rule #2 would make the right side “10 X 10 / 2”. You might try adding up, one ten, plus two threes, plus… one one? The rules don’t pertain to anything except for Tens and Threes. Here’s one to stretch your noggin some: What is 17dBm? Well, you say, but what about when the number doesn’t contain Tens or Threes? My answer: the Rules stay the same. How many Tens? How many Threes? – the left side should have something like this: “10dB+10dB+3dB+3dB+3dB” – and the right side would then be converted using Rule #2 to: “10 X 10 X 2 X 2 X 2 = 800” Perhaps now we can try one a bit more difficult: What is 29dBm? To the normal math on the right side equation and you’ll have your answer! Thus we will write on the right side of the line, “2 times 2”. ![]() And the rule says pluses are equal to times. If on the left we have a “3dB + 3dB” – then on the right side we need to put the equivalents based on Rule #2. Now that we have the left side, the decibel side completed, we just need to apply Rule #2 on the right side to get our answer. So write it down on the left side of your line. Then we have to ask ourselves, “How many threes and tens are there?” – In this case, we have Two Threes in Six. Since the 6dB is in decibels, we’ll have to put it on the left side of the line. The question at hand is what is what is the conversion from 6dB to normal math? Left side is for Decibels and Right Side is for Normal.Īs a reminder, I like to add the memorized details of Rule #2 at the top of my paper – something like this: Specifically to give me a left side for decibel math, and a right side for normal math. To apply the first rule, I like to draw a vertical line on the paper. Now, all we have to do in order to calculate decibel math functions is to refer to the two rules above. All you have to remember is these two rules above. That is all there is to doing decibel math. Some try to think here… resist the urge… this is a math trick, just follow the rules and everything will be fine. ![]() Don’t ask questions… don’t try to understand – just flat out memorize these! Just memorize this – no need to try to understand it – just memorize this. Just remember decibel on the left, and normal on the right. That is all, nothing more to rule number one. Just simple math, adding, subtracting, multiplying and dividing – things you can do in your head.īut you have to follow the rules – that’s it, just follow the rules outlined below, and you too can be a whiz at decibel math! Rule #1Īnd the right side is the normal math side. And no, we aren’t going to be using any logarithmic function. These are the fixed, and immovable rules for all dB math functions. In doing decibel math – all you have to do is remember two rules. If you could do the easy math questions above, you have the math skills necessary to learn decibel math! First – the Rules I’m sure you can all pass the “Pre-Test” below. Perhaps the only thing worse would have been if we used Sine and Cosine formulas…Īnd yet – the actual process of doing decibel math isn’t difficult at all. This is what brings back all the anxious thoughts – seeing logarithms again. Most start teaching dB math with a formula of the actual decibel math, something like this. ![]()
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