Why does Time Capsule echo when time machine backs up?

Every time time machine backs up I get horrid echo sounds from my Bose speakers which are attached to the computer.  I use Time Capsule and have for quite a while but this is a new problem - probably about two weeks since it started.  It is driving me nuts as it is loud.

There is always a low hum from TC which i dislike but I moved it so it is faint. 
Bad.. very bad.. there should not be a low hum "always" from a TC.. If the hum is 50hz, 60hz 100hz or 120hz.. it is a power supply issue that probably just got worse. They do not hum in normal use.. there is a fault in the power supply.
Take it back to apple and get it replaced. Wipe it before you take it in.. they should exchange it.
In normal operation you can put your ear up against the TC.. and power it on..
The start up cycle goes like this.
Fan will immediately start up.. and front LED will flash momentarily green go off then begin flashing amber.
Fan will cut off and the hard disk will spin up.. this is several seconds into the boot cycle.
Hard disk will settle to normal operation.. disk test complete. TC will finish the boot. LED will go green (if everything is good).. after about 1min the disk will stop spinning. From this point the TC should make no noise at all. Audio noise at least. If you have internal power supply hum.. it has faulty transformer or some other part. Since it is under warranty pass it back for replacement.

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    I've not searched through the postings here to see if other people have seen a similar problem. I've not attempted to repeat the problem I've seen here so I'm not very clear about the cause.
    I'm using a MacBook Pro with OS 10.5.4 connected via a network cabled directly to a Time Capsule which is connected to a DSL/Cable modem. The Time Capsule is updated with v 7.3.2 of the firmware. I've got Time Machine enabled but I'm also using the Time Capsule disk (1TB) to store photos that I've previously archived to CD. I'm in the process of copying all the data from CD to the Time Capsule.
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    I'm guessing that my doing a search (or some other drive activity on Time Capsule) at the same time as Time Machine kicking in with a backup caused Time Capsule to crash.
    Perhaps this is not a very interesting point if this problem is not repeatable but - well, I'd be interested to know if others have seen similar behavior...

    I'm having a very similar problem and it is detrimental.
    Here is the scenario: I have a 1TB Time Capsule as my primary router. I am able to perform backups on all but one of my machines. My iMac backs up via 1GB ethernet to the TC, my MacBookAir (60GB,SS) backs up via wireless N (270mb) and my other MacBookAir (80GB,IDE) also backs up via wireless N without any problems.
    I used to use a 500mb external drive to backup my iMac but outgrew it, so I started backing up to the TC instead. No problems at all.
    I also used to back up my Intel MacMini running Mac OS X Server 10.5.5 to a similar external hard-drive but haven't in a while.
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  • HT4628 Why does internet connection on my Time Capsule cut out (on main but not guest network)?

    Hi - I just got a time capsule 802.11n to use with my Macbook (OSX 10.6.8).
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  • Time Capsule error when interrupting a regular hourly backup

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    Not for me. I got Time Capsule right when it was released and it worked like a charm for a whole entire month... Until one day I made the mistake of interrupting one of its backups. When I got back to my computer I got an error saying the backup could not be completed. I thought it was no big deal until I actually tried to start a backup again. First it stayed on "Preparing" for a long time... Then a similar error message. I tried again and again and got nothing but error messages. Nothing I tried worked.
    I decided to erase the Time Capsule disk and start over, essentially losing a month's worth of backups. Once again it worked for a few days until once again I put my Mac to sleep while it was doing a regular backup. Once again, coming back to my computer resulted in an error message. Once again it couldn't recover no matter what I did. I decided to try again from scratch, erased the drive, did the big backup.
    Today, after three days of it working just fine, I had to leave my house in the middle of a backup. I paused for a moment wondering if I should do it, but then thought, what the ****, you're SUPPOSED to be able to interrupt it.
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    My time capsule freezes when data is transferring from my Macbook Pro during its initial update. I tried to connect it through WiFi or ethernet cable. It just freezes like when 800 Mb - 5 Gb were transferred (I have left it overnight). What can I do?
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  • Setting up Time Capsule as a Time Machine backup disk

    I just bought a new Airport Extreme base station unit. I set it up the wireless network just fine, and am running 2 Macbook Pro's and 2 wireless printers on the network. The newer Macbook Pro is an early 2011 model running Mavericks. Airport Utility is 6.3.2. Software is all up-to-date.  When I enter Time Machine Preferences and select "choose disk", I see an external hard disk connected via USB (I had been using that as a Time Machine Backup prior to purchasing the Airport Extreme) and I also see a selection called "Other Time Capsule". When I select that option, the airport utility opens and it shows icons for "Internet" and "Airport Extreme". Both show green "lights". I cannot seem to select anything. The instruction manual says to follow the setup instructions at this point, however there are none. The Macbook Pro is connected wirelessly to the base station. (The older Macbook Pro is a 2010 model running Snow Leopard. The airport wireless network connection works fine but the OS needs to be upgraded before I could use the Time Capsule on this computer).
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    Long time reader, first-time poster.
    OK, so I just got my new 1TB Time Capsule, set it up and am ready to start designing my backup strategy for home. I'd like to do a few things, and looking for some advice:
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