my man your videos are amaizing, im a sound engineering student, and we had these subjects in our acoustic classes, but I quite didn't understand, partly because my classes are not in my mother language, but I'm gonna send your channel to all of the sound engineering students i know, which I know they usually have problems with acoustics as a subject.
Thanks for your dedication and wonderful videos. I have enjoyed every video. Acoustics is a complicated subject and your videos help and I can point people to them when needed. Thanks again.
Hi! thank you for sharing knowledge. One quick question at 9:14, how come there is an absolute value at the 10log(q/4pir^2)? This mean that whenever you get closer to the source than 0.282m, the spl actually get quieter? How can this possibly be?
Hello there! Great observation. I was thinking about the same question when I was doing the research. The reason why I didn't explain this in the video was that I wasn't a 100% sure. So the idea of sound power is purely theoretical. It's calculated for a point source. Point sources don't exist in nature, and for geometric calculations for surface area (to calculate sound pressure) we have to use a unit source rather than a point source, because the surface area of a point source is 0. In the metric system, the unit of measurement is a meter. So we consider a spehrical source of sound rather than a point source. If we do this, then the sound power is emanating from the surface of this sphere, so naturally the sound pressure will be maximum at the surface (0.282m). If you go lower in distance, it's almost like you are going into the source of sound, which doesn't make sense. But you can also think about it like this: You have a speaker in a cabinet. At the cone of the speaker, sound pressure is highest. But if you go further, you go past the cone and into the cabinet, essentially going through the source of sound to the other side. And if you think about it, sound pressure will be lower within the cabinet than at the cone.
my man your videos are amaizing, im a sound engineering student, and we had these subjects in our acoustic classes, but I quite didn't understand, partly because my classes are not in my mother language, but I'm gonna send your channel to all of the sound engineering students i know, which I know they usually have problems with acoustics as a subject.
Thank you very much! Glad you like it enough to share! All the best with your class
@9:21, you are not entirely sure how useful this information is. Let me tell you, this whole video is very useful, helpful, and well made. Thank you.
Great Videos! Thank you for making everything crystal clear. You have a great way of explaining things.
Thank you very much!
Your videos are great! More people should watch them!
"If you build, they'll come"
Thanks for checking it out!
Thanks for your dedication and wonderful videos. I have enjoyed every video. Acoustics is a complicated subject and your videos help and I can point people to them when needed. Thanks again.
Thank you very much for the kind feedback! You've got a really interesting channel as well!
I had many confusions from my Physics classes. Your videos were suggested by TH-cam for the subject of acoustics and they are truly interesting!
Cheers! I'm glad it was useful!
Thankyou sir, finishing it today
Your videos are brilliant! Thank you very much.
Thanks very much for checking them out!
Great effort
Thank you very much
You're welcome!
Hi! thank you for sharing knowledge.
One quick question at 9:14, how come there is an absolute value at the 10log(q/4pir^2)? This mean that whenever you get closer to the source than 0.282m, the spl actually get quieter? How can this possibly be?
Hello there! Great observation. I was thinking about the same question when I was doing the research. The reason why I didn't explain this in the video was that I wasn't a 100% sure.
So the idea of sound power is purely theoretical. It's calculated for a point source. Point sources don't exist in nature, and for geometric calculations for surface area (to calculate sound pressure) we have to use a unit source rather than a point source, because the surface area of a point source is 0. In the metric system, the unit of measurement is a meter. So we consider a spehrical source of sound rather than a point source.
If we do this, then the sound power is emanating from the surface of this sphere, so naturally the sound pressure will be maximum at the surface (0.282m). If you go lower in distance, it's almost like you are going into the source of sound, which doesn't make sense. But you can also think about it like this:
You have a speaker in a cabinet. At the cone of the speaker, sound pressure is highest. But if you go further, you go past the cone and into the cabinet, essentially going through the source of sound to the other side. And if you think about it, sound pressure will be lower within the cabinet than at the cone.
This is actually quite useful. Thank you.
Cheers! Glad you think so..
The ability of source to produce sound is described by
a.sound power
b.sound pressure
c.sound energy
D.sound frequency
Need help with correct ans
Anyone pls help me with the right answer p
THANK YOU
Is it ok if I show parts of your videos to my students? The graphics are really useful and quite entertaining. Keep it up!
Ofcourse! Go for it.