You say that volume and amplitude are not the same but is it also true that by increasing or decreasing the amplitude, you are directly effecting the volume?
They are both slightly different concepts, indeed. It basically comes down to one being an objective measurement, and the other being a subjective interpretation. Similar to how SPL's (Sound Pressure Levels) are simply variations in atmospheric pressure (objective), while 'sound' is the active interpretation of said SPL's (subjective).
@@hendrix5757 this reminds me of how light is measured. One can measure it objectively using watts per steradian (angle area), or subjectively using the unit candela
can someone tell me the difference between the envelope and the waveform (sinus, square)? even a square has its amplitude, the envelope must be something completeley different. just the fact that envelope is the amplitude is confusing me . ??
The wave shape determines the timbre of the sound - what it actually sounds like. The frequency of the wave determines the pitch - the note you play. The amplitude of the wave determines the volume (kind of). Each is quite different and somewhat independent. The shape of the wave and the amplitude of the wave (how big/tall the wave shape is) are two different things. And how the amplitude changes over time is the envelope.
Hey, nice video, but it seems you contradict yourself on the maths. At 3:06, you say that doubling the number of instruments multiplies the volume by roughly 1.4. Then at 7:33, you say that multiplying the number of instruments doubles the volume of the music. This does not work out mathematically, because 1.4 ^ ( ln(10) / ln(2) ) ≈ 3. If we assume that ten instruments sound twice as high as one, then 1.2 is a better approximation for the loudness factor of doubling the number of instruments. If we, on the other hand, assume that the loudness factor of doubling the number of instruments is 1.4, then multiplying the amount of instruments by four should be enough to double the volume.
The channel say it a bit wrong though. A lot of intermediate terms like loudness (that this channel define) or intensity i don't understand what it means but i know some main terms. The amplitude of a wave is the distance from the peak of the wave to the 0 position. The volume is the loudness. It is the human perception of this amplitude, measured in dB. If 1 instrument create sound wave with amplitude 1, then 2 instruments will create wave with amplitude root 2. Because wave with amplitude 1 have energy 1^2=1, 2 wave like that will have total power of 2, equivalent with 1 sound wave with amplitude of root 2. But the volume has nothing to do with that. If the wave's energy 1 correspond with volume 0 dB then the wave's energy 1x10=10 will correspond with volume 0+10=10 dB. Those are 2 separate thing. And the wrong thing that this channel say is that volume is just the measurement, not the actual loudness. The volume IS the loudness (or at least proportion to it).
Two instruments playing will double the sound power but this increases sound pressure by the square root of 2 or 1.414. Nothing to do with interference.
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Thank you for this playlist! I have been trying to understand this for years and you explain it so well!!
Your video is crystal clear!!! Thanks so much for that!
If our hearing range is 20-20000Hz on avg., then musically (logarithmically) the middle of our range is 632.455532Hz
wow! I love this channel! Thanks for making these videos 🤩
Excellent videos. Very good presentation on basics with animation. Thanks.
Very good videos. Very clear, good explaining speed and with lots of examples. THANK YOU!
Such a damn good video packed with information that’s explained thoroughly.
Thank you for this! 🙏🏽
Thank you, it was very concise and informative.
Very well done. Thank you :-)
thanks for the precious information!
Great video! Thanks!
These are great videos btw. You should make a video about tonality diamonds
very clear explanation thx
Today i learned... TY
you're a hero
1.4 is roughly the square root of 2, our hearing is logarithmic not linear
You magically introduce the term “perfect fifth” at 7:05 and it hasn’t been introduced anywhere previously
You say that volume and amplitude are not the same but is it also true that by increasing or decreasing the amplitude, you are directly effecting the volume?
Yep, correct. Increasing amplitude increases volume, but they are slightly different concepts.
They are both slightly different concepts, indeed. It basically comes down to one being an objective measurement, and the other being a subjective interpretation. Similar to how SPL's (Sound Pressure Levels) are simply variations in atmospheric pressure (objective), while 'sound' is the active interpretation of said SPL's (subjective).
@@hendrix5757 this reminds me of how light is measured. One can measure it objectively using watts per steradian (angle area), or subjectively using the unit candela
i got bored so i watched this pretty interesting
can someone tell me the difference between the envelope and the waveform (sinus, square)? even a square has its amplitude, the envelope must be something completeley different. just the fact that envelope is the amplitude is confusing me . ??
The wave shape determines the timbre of the sound - what it actually sounds like. The frequency of the wave determines the pitch - the note you play. The amplitude of the wave determines the volume (kind of). Each is quite different and somewhat independent. The shape of the wave and the amplitude of the wave (how big/tall the wave shape is) are two different things. And how the amplitude changes over time is the envelope.
thank you!
Hey, nice video, but it seems you contradict yourself on the maths. At 3:06, you say that doubling the number of instruments multiplies the volume by roughly 1.4. Then at 7:33, you say that multiplying the number of instruments doubles the volume of the music. This does not work out mathematically, because
1.4 ^ ( ln(10) / ln(2) ) ≈ 3.
If we assume that ten instruments sound twice as high as one, then 1.2 is a better approximation for the loudness factor of doubling the number of instruments.
If we, on the other hand, assume that the loudness factor of doubling the number of instruments is 1.4, then multiplying the amount of instruments by four should be enough to double the volume.
The channel say it a bit wrong though. A lot of intermediate terms like loudness (that this channel define) or intensity i don't understand what it means but i know some main terms.
The amplitude of a wave is the distance from the peak of the wave to the 0 position. The volume is the loudness. It is the human perception of this amplitude, measured in dB.
If 1 instrument create sound wave with amplitude 1, then 2 instruments will create wave with amplitude root 2. Because wave with amplitude 1 have energy 1^2=1, 2 wave like that will have total power of 2, equivalent with 1 sound wave with amplitude of root 2.
But the volume has nothing to do with that. If the wave's energy 1 correspond with volume 0 dB then the wave's energy 1x10=10 will correspond with volume 0+10=10 dB.
Those are 2 separate thing.
And the wrong thing that this channel say is that volume is just the measurement, not the actual loudness. The volume IS the loudness (or at least proportion to it).
Two instruments playing will double the sound power but this increases sound pressure by the square root of 2 or 1.414. Nothing to do with interference.