Electret and loud music

[Zeldus]

Hello,


Is it possible than loud music and sounds in night clubs could damage
electrets mics from mobile phone ? Is the limit of actual mobile phone
is near 95 db SPL ?

A friend of me complains her mobile mobile phone's mic doesn't work well
since she have been to night club a few weeks ago. (Her correspondants
can not hear here voice correctly at any time, in any condition, so, it
seems the phone mic may be damaged a litle) .

Thanks an advance for your help and informations,


Zeldus

 

[Joseph Ashwood]

Is it possible than loud music and sounds in night clubs could damage
electrets mics from mobile phone ?

From a theoretical perspective it is entirely possible, a big enough
compression wave (sound is one type) can break just about anything.

Is the limit of actual mobile phone
is near 95 db SPL ?

Almost certainly not. What more likely happened (if it did indeed occur at
the same time) is that your friend got a wee bit too drunk and spilled her
150 proof "water" on it, ran into something, or heaven forbid dropped the
phone when she was hugging the sidewalk.
Joe

 

[Richard Crowley]

Is it possible than loud music and sounds in night clubs could damage
electrets mics from mobile phone ? Is the limit of actual mobile phone
is near 95 db SPL ?

A friend of me complains her mobile mobile phone's mic doesn't work
well
since she have been to night club a few weeks ago. (Her correspondants
can not hear here voice correctly at any time, in any condition, so,
it
seems the phone mic may be damaged a litle) .

Thanks an advance for your help and informations,

Didn't get some kind of alcoholic beverege dripped into it, perhaps?

 

[Zeldus]

Didn't get some kind of alcoholic beverege dripped into it, perhaps?

I don't think so
My question was more to know what is the actual limit in decibel where an
electret used in a mobile phone can be damaged by a very strong level sound
exposure. Some people say it's 95 DB SPL which it seems low... A train or a
truck can create louder noise.

Zeldus

 

[Arny Krueger]

"Richard Crowley" <[email protected]> a écrit dans le
message de news: [email protected]...

I don't think so

OK, so maybe it was Diet Coke? ;-)

My question was more to know what is the actual limit in
decibel where an electret used in a mobile phone can be
damaged by a very strong level sound exposure.

Probably, loud enough to physcially damage it in other ways.

Some people say it's 95 DB SPL which it seems low...

I've looked at the spec sheets for mics like those in cell phones, and they
specified marginally linear operation at something like 114 dB. That's not
the point of damage, that's the 10% THD point.

A train or a truck can create louder noise.

Agreed.

A car with open windows and going 70 mph might generate LF sounds in the 130
dB range.

 

[Anahata]

Didn't get some kind of alcoholic beverege dripped into it, perhaps?

If not that, at least very high humidity from being surrounded by sweaty
bodies? Electrets aren't best suited to humidity.

As for sound level, I'd have thought 95dB could easily be exceeded by
shouting in to the phone, and most mics don't suffer distortion (never
mind permanent damage) until much higher levels than that.

Anahata

 

[I.F.]

I don't think so
My question was more to know what is the actual limit in decibel where an
electret used in a mobile phone can be damaged by a very strong level
sound exposure. Some people say it's 95 DB SPL which it seems low... A
train or a truck can create louder noise.

Zeldus

Ask your friendly neighbourhood gangster - if gunshots don't damage a cell
mic then nightclub music is unlikely to!

 

[Karl Engel]

"A car with open windows and going 70 mph might generate LF sounds in the
130
dB range"

Is it fair to say that skydivers may well have severely compromised LF
hearing? It's been a long time, but from memory typical jumps give 1-1.5
mins freefall at a time, maybe 3-4 times a day, one or two days a week.
This mightn't be enough to do anything permanent - maybe cumulatively
though.

 

[Scott Dorsey]

Is it fair to say that skydivers may well have severely compromised LF
hearing? It's been a long time, but from memory typical jumps give 1-1.5
mins freefall at a time, maybe 3-4 times a day, one or two days a week.
This mightn't be enough to do anything permanent - maybe cumulatively
though.

HOPEFULLY they are wearing hearing protection, both ear plugs and the
proection integral to their helmet.

Note that spending an hour or so in the back of a C-130 is probably worse
for your hearing than the actual jump, but this isn't saying much.
--scott

 

[Zeldus]

I've looked at the spec sheets for mics like those in cell phones, and
they specified marginally linear operation at something like 114 dB.
That's not the point of damage, that's the 10% THD point.

Thanks for the informations.
And in a very loud sound condition (stronger than night clubs like
industrial tools or guns shoots, higher than 130 DB), is there a risk of
damage if the cell phone is switched off ? I mean is there a difference if
the cell phone is on or off for the damage risk because of the sound
conditions)

Thanks,

Zeldus

 

[anahata]

And in a very loud sound condition (stronger than night clubs like
industrial tools or guns shoots, higher than 130 DB), is there a risk of
damage if the cell phone is switched off ?

If it's going to get damaged it makes no difference whether the phone is
switched on or off. The damage is purely mechanical.