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When my wireless USB mouse receiver is plugged into my laptop, my laptop generates a high-pitched hissing noise that's very irritating -- but only if the CPU is idling. (It goes away when there is CPU activity.)

What's the best way (if any) of getting rid of the noise?

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Is your cellphone near the usb device? – Dez Mar 23 '12 at 3:16
    
Can you tell where the noise is coming from? Is it coming from the speakers? – David Schwartz Mar 23 '12 at 3:26
    
@Dez: Nope..... – Mehrdad Mar 23 '12 at 3:36
1  
Similar: superuser.com/questions/121883/… – Ƭᴇcʜιᴇ007 Mar 23 '12 at 4:26
1  
Also similar (except this one happens even on AC power with no battery): superuser.com/questions/373679/… – Mehrdad Mar 23 '12 at 22:36

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