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From: JosephKK on 11 Aug 2010 07:27
On Tue, 03 Aug 2010 21:07:58 -0500, Douglas Beeson <unkown(a)xnntp>
wrote:

>First my daughter's iPod starting sounding strange. When she let me
>listen (took some negotiation), it seemed as if the sound had dropped
>either all, or a significant chunk of, the bass response. Singers no
>longer sounded autotuned (!). Wiggling the plug in the 1/8" connector
>sometimes helped, as did changing earbuds.
>Then tonight, on a flight home, I experienced the same problem with my
>own (otherwise perfectly reliable) earbuds on the aircraft
>entertainment system: very attenuated bass and midrange. Instant bad
>karaoke.
>
>What could be going on with the connector? I could understand crackle
>and complete loss of signal, but this seems very frequency selective.
>If the input stage has a high-pass filter on it, wouldn't increasing
>impedence lower the cutoff frequency, not raise it?
>

It could be that the earbuds (more likely the cord somewhere)
themselves have failed. Unless very expensive, repairing the earbuds
cord is unlikely to be cost effective and a serious case of
frustration.
From: Grant on 11 Aug 2010 11:45
On Wed, 11 Aug 2010 04:27:07 -0700, "JosephKK"<quiettechblue(a)yahoo.com> wrote:

>On Tue, 03 Aug 2010 21:07:58 -0500, Douglas Beeson <unkown(a)xnntp>
>wrote:
>
>>First my daughter's iPod starting sounding strange. When she let me
>>listen (took some negotiation), it seemed as if the sound had dropped
>>either all, or a significant chunk of, the bass response. Singers no
>>longer sounded autotuned (!). Wiggling the plug in the 1/8" connector
>>sometimes helped, as did changing earbuds.
>>Then tonight, on a flight home, I experienced the same problem with my
>>own (otherwise perfectly reliable) earbuds on the aircraft
>>entertainment system: very attenuated bass and midrange. Instant bad
>>karaoke.
>>
>>What could be going on with the connector? I could understand crackle
>>and complete loss of signal, but this seems very frequency selective.
>>If the input stage has a high-pass filter on it, wouldn't increasing
>>impedence lower the cutoff frequency, not raise it?
>>
>
>It could be that the earbuds (more likely the cord somewhere)
>themselves have failed. Unless very expensive, repairing the earbuds
>cord is unlikely to be cost effective and a serious case of
>frustration.

You opened one up to see what wire they use?

Grant.
From: JosephKK on 12 Aug 2010 22:07
On Thu, 12 Aug 2010 01:45:13 +1000, Grant <omg(a)grrr.id.au> wrote:

>On Wed, 11 Aug 2010 04:27:07 -0700, "JosephKK"<quiettechblue(a)yahoo.com> wrote:
>
>>On Tue, 03 Aug 2010 21:07:58 -0500, Douglas Beeson <unkown(a)xnntp>
>>wrote:
>>
>>>First my daughter's iPod starting sounding strange. When she let me
>>>listen (took some negotiation), it seemed as if the sound had dropped
>>>either all, or a significant chunk of, the bass response. Singers no
>>>longer sounded autotuned (!). Wiggling the plug in the 1/8" connector
>>>sometimes helped, as did changing earbuds.
>>>Then tonight, on a flight home, I experienced the same problem with my
>>>own (otherwise perfectly reliable) earbuds on the aircraft
>>>entertainment system: very attenuated bass and midrange. Instant bad
>>>karaoke.
>>>
>>>What could be going on with the connector? I could understand crackle
>>>and complete loss of signal, but this seems very frequency selective.
>>>If the input stage has a high-pass filter on it, wouldn't increasing
>>>impedence lower the cutoff frequency, not raise it?
>>>
>>
>>It could be that the earbuds (more likely the cord somewhere)
>>themselves have failed. Unless very expensive, repairing the earbuds
>>cord is unlikely to be cost effective and a serious case of
>>frustration.
>
>You opened one up to see what wire they use?
>
>Grant.

A couple of times. The wound foil on plastic fibers (sometimes
concentric) is a real MF to deal with. With spiraled conductors on
the outer concentric layer just as bad.
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