Loudness the law of devils land - LOUDNESS - Official Website - | HISTORY


If I 1 = dB, then I 2 = dB You can explore numerically to confirm that doubling the distance drops the intensity by about 6 dB and that 10 times the distance drops the intensity by 20 dB.

Just as there are several kinds of potential energy, so there are different kinds of kinetic energy too. When a thundercloud releases its electrical potential energy as lightning, giant sparks fly from the sky to the ground. A bolt of lightning is a huge electric current (flow of electricity) moving through the air—in other words, it is what we might refer to as "electrical kinetic energy". We can also think of sound, heat, and light as examples of kinetic energy because they involve energy moving from one place to another.

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Loudness normalization is a specific type of audio normalization that equalizes perceived level such that, for instance, commercials do not sound louder than television programs. Loudness normalization schemes exist for a number of audio applications.

As you can see, it takes considerable increases in power—in the wattage of the amplifier—to "double" the perceived "volume." This is where speaker sensitivity/efficiency comes into the equation. If we replace that 90dB @ 1W/1m speaker with a model that has a sensitivity of 100dB @ 1W/1m, the numbers change dramatically. For starters, 1W of input power will give us 100dB SPL. Remember, the first speaker required 10W to achieve that same volume level! So by installing a more efficient speaker, we can get the same perceived volume level from a 1W amp as we could from a 10W amp that is coupled to a less efficient speaker. Again, this applies all the way up to the maximum power handling capacity of the speaker. Assuming our 100dB @ 1W/1m speaker can also handle up to 100W, it can give us up to 120dB SPL; again, that's double the perceived "volume level" of the 90dB @ 1W/1m 100W speaker's maximum level of 110dB SPL.

This is too complicated for little ole me and I was wondering, are there any tv's that control the volume without extra equipment?


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