Recent content by Sarahborg

The Math Doctors - Both as a blog & as a help site. It's excellent

I found this I really can't thank you enough for your very detailed explanation. I got the gist of it. Thanks!

I did, but still didn't understand how sound vibrations vary within the same room.

What does it have to do with standing waves and interference patterns? And what are interference patterns exactly? I am a bit lost here. Also, how would you detect the source of a sound if it is not heard the same within a room and how close or far away you are does not make any difference...

Maybe it varies depending on how close or far away one is from the source of the sound?

It echoes depending on how much the room is full or empty (as in it echoes less in a room with a lot of furniture)

Maybe the vibrations are less powerful? I'm not sure on this one. Double glazing works because of the thin air gap layer between the two glass panes, so sound doesn't enter, since some of it is reflected back

So if you close the door or a window, air isn't entering the room you're in, but sound waves travel through the glass of the window or the wood of the door. The problem is how to stop sound from entering. Maybe you can use soundproof materials that absorb sound?

So apart from closing all doors and windows (which is not that ideal in summer) and double glazing, what other options would you suggest? Thank you very much for your patience!

I was initially thinking of double glazing or cavity walls. However, these are quite impractical as well since one assumes the house is already built.

Vibrations pass through air. We only dealt with mechanical waves. We just mentioned that stationery waves are found for example in string instruments.

No, there isn't any diagram. It is just a theory question where we are meant to explain how vibrating sounds (ex those from air-conditioners) entering the house could be reduced. Thanks

Homework Statement How can one reduce the vibrations entering the house? And why do certain sounds vibrate more in certain place, but quiet fown if you move a bit further away. Homework EquationsThe Attempt at a Solution I was thinking it's something to do with the fact that sounds wave are...

Homework Statement How does a hydraulic machine work? Homework Equations P=F/A The Attempt at a Solution I know that these work because the pressure is the same throughput the system and that these are multiplier machines because the force is magnified by the magnified area, but I don't...

As far as I know, in a converging lens, only when the object is between the optical centre and the focal length that the image is virtual (i.e. the setting used in a magnifying glass).