Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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  #1   Report Post  
Robert Whipple
 
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Default microwave oven - beeper too loud

Is ther any way to tone down the volume?

  #2   Report Post  
 
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Tape some squeezably soft Charmin toilet tissue over the hole in the
peizo buzzer. lol

Actually, just find the peizo buzzer. If it is not one that has the
adjustable top on it to close off the hole, get some sticky back loose
rubber foam and stick it over the hole. DO NOT completely block off the
outlet to the buzzer as it will over time damage the peizo element.

  #3   Report Post  
Sam Goldwasser
 
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writes:

Tape some squeezably soft Charmin toilet tissue over the hole in the
peizo buzzer. lol

Actually, just find the peizo buzzer. If it is not one that has the
adjustable top on it to close off the hole, get some sticky back loose
rubber foam and stick it over the hole. DO NOT completely block off the
outlet to the buzzer as it will over time damage the peizo element.


Huh?

--- sam | Sci.Electronics.Repair FAQ Mirror:
http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

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  #4   Report Post  
Seafarer
 
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On 24 Jul 2005 08:45:43 -0400, Sam Goldwasser
wrote:

writes:

Tape some squeezably soft Charmin toilet tissue over the hole in the
peizo buzzer. lol

Actually, just find the peizo buzzer. If it is not one that has the
adjustable top on it to close off the hole, get some sticky back loose
rubber foam and stick it over the hole. DO NOT completely block off the
outlet to the buzzer as it will over time damage the peizo element.


Huh?

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header above is
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Same for me!
Frank@TeleTronic Services[UK]
  #5   Report Post  
 
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Huh? What?



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NSM
 
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wrote in message
ups.com...

DO NOT completely block off the
outlet to the buzzer as it will over time damage the peizo element.


That's extremely unlikely to damage anything - unless you touch the HV
capacitor.

N


  #7   Report Post  
 
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Actually, a peizo buzzer can be damaged if the hole for the sound is
completely blocked off. Over time the peizo element will crack from
the excessive resonance inside the peizo housing and simply stop
working. I have seen this personally too many times when nurses will
completely tape over the alarm ports on piezo buzzers instead of using
the volume control properly.

  #8   Report Post  
James Sweet
 
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wrote in message
ups.com...
Tape some squeezably soft Charmin toilet tissue over the hole in the
peizo buzzer. lol

Actually, just find the peizo buzzer. If it is not one that has the
adjustable top on it to close off the hole, get some sticky back loose
rubber foam and stick it over the hole. DO NOT completely block off the
outlet to the buzzer as it will over time damage the peizo element.


How will it damage it? I've been sticking a piece of scotch tape over the
piezo speaker in PC's to make it quieter for at least a decade, never had
one fail in any way and it makes it much quieter.


  #9   Report Post  
 
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Completely blocking off the output messes up the resonance of the
housing, this can cause excessive vibration of the piezo element and it
can crack. Obviously scotch tape still vibrates and passes the sound
out, it is not a complete block of the sound outlet.

We have even received a service bulletin from one particular medical
device manufacture due to the high failure of the peizo buzzers and the
cause being the nurses putting the thick tape over the buzzer hold
because it was too loud for them, completely blocking off the hole.
Not to mention the fact that the nurse was in effect tampering with a
patient safety alarm in the first place, what they did would eventually
completely disable the alarm putting the patient at even greater risk.

  #10   Report Post  
NSM
 
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wrote in message
ups.com...

Actually, a peizo buzzer can be damaged if the hole for the sound is
completely blocked off. Over time the peizo element will crack from
the excessive resonance inside the peizo housing and simply stop
working. I have seen this personally too many times when nurses will
completely tape over the alarm ports on piezo buzzers instead of using
the volume control properly.


Damn those annoying heart rate monitors!

N




  #11   Report Post  
Jonathan
 
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I'd believe that, peizo is a type of crystal after all which would be rather
brittle. I'd imagine like microwaves, medical gear would have a high
frequency tone unlike a PC speaker which is usually a bit lower, and
certainly not a constant tone, unless you have a really old PC and play 4
colour DOS based games on it

JD

wrote in message
oups.com...
Completely blocking off the output messes up the resonance of the
housing, this can cause excessive vibration of the piezo element and it
can crack. Obviously scotch tape still vibrates and passes the sound
out, it is not a complete block of the sound outlet.

We have even received a service bulletin from one particular medical
device manufacture due to the high failure of the peizo buzzers and the
cause being the nurses putting the thick tape over the buzzer hold
because it was too loud for them, completely blocking off the hole.
Not to mention the fact that the nurse was in effect tampering with a
patient safety alarm in the first place, what they did would eventually
completely disable the alarm putting the patient at even greater risk.



  #12   Report Post  
Stan
 
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" wrote:

}Actually, a peizo buzzer can be damaged if the hole for the sound is
}completely blocked off. Over time the peizo element will crack from
}the excessive resonance inside the peizo housing and simply stop
}working.

Boy, you learn something new every day. Perhaps the makers of these
heart monitors should make it easier to adjust the sound...perhaps
add the ability to download "ring-tones"...("Another One Bites the Dust",
by Queen)

Stan.
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Sam Goldwasser
 
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"James Sweet" writes:

wrote in message
ups.com...
Tape some squeezably soft Charmin toilet tissue over the hole in the
peizo buzzer. lol

Actually, just find the peizo buzzer. If it is not one that has the
adjustable top on it to close off the hole, get some sticky back loose
rubber foam and stick it over the hole. DO NOT completely block off the
outlet to the buzzer as it will over time damage the peizo element.


How will it damage it? I've been sticking a piece of scotch tape over the
piezo speaker in PC's to make it quieter for at least a decade, never had
one fail in any way and it makes it much quieter.


What piezo speaker inside a PC?

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header above is
ignored unless my full name is included in the subject line. Or, you can
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  #14   Report Post  
Franc Zabkar
 
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Default

On 24 Jul 2005 18:54:49 -0400, Sam Goldwasser
put finger to keyboard and composed:

"James Sweet" writes:

wrote in message
ups.com...
Tape some squeezably soft Charmin toilet tissue over the hole in the
peizo buzzer. lol

Actually, just find the peizo buzzer. If it is not one that has the
adjustable top on it to close off the hole, get some sticky back loose
rubber foam and stick it over the hole. DO NOT completely block off the
outlet to the buzzer as it will over time damage the peizo element.


How will it damage it? I've been sticking a piece of scotch tape over the
piezo speaker in PC's to make it quieter for at least a decade, never had
one fail in any way and it makes it much quieter.


What piezo speaker inside a PC?


After a couple of minutes with Google:
http://www.uktsupport.co.uk/pb/mb/850.htm
http://www.tomshardware.com/motherbo...6/i815-12.html

http://support.intel.com/support/mot.../cs-013312.htm
http://www.gen-x-pc.com/motherboard_table.htm

http://www.cluboverclocker.com/revie...tyNFIIB/p3.htm
http://www.elhvb.com/mboards/BCM/fm567/567OVW.asp


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
  #15   Report Post  
Adam Sampson
 
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Default

Sam Goldwasser writes:

What piezo speaker inside a PC?


Not entirely implausible -- I've encountered a couple of machines with
piezo transducers on the motherboard instead of the regular little
speaker that most machines have. One of them had a speaker as well for
no obvious reason, and I was most annoyed to find that removing the
speaker didn't stop it beeping on power-up...

I've also seen a Promise RAID controller (an SX-6000, I think?) that
had a piezo beeper on the PCI card. Since it beeped every couple of
seconds whenever it was checking or rebuilding the array (which could
take several hours), it fairly quickly got a blob of Blu-Tak wedged
over it to make it a bit quieter.

--
Adam Sampson http://offog.org/


  #16   Report Post  
James Sweet
 
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How will it damage it? I've been sticking a piece of scotch tape over

the
piezo speaker in PC's to make it quieter for at least a decade, never

had
one fail in any way and it makes it much quieter.


What piezo speaker inside a PC?



90% of the motherboards I've come across in the last decade have a piezo
speaker soldered to them rather than needing to plug in that paper cone
speaker on the case. It's only used for beep codes these days anyway.


  #17   Report Post  
Sam Goldwasser
 
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Adam Sampson writes:

Sam Goldwasser writes:

What piezo speaker inside a PC?


Not entirely implausible -- I've encountered a couple of machines with
piezo transducers on the motherboard instead of the regular little
speaker that most machines have. One of them had a speaker as well for
no obvious reason, and I was most annoyed to find that removing the
speaker didn't stop it beeping on power-up...


I suppose that since the PC "speaker" has little function in most systems,
going to a piezo beeper would be a reasonable cost savings.

I've also seen a Promise RAID controller (an SX-6000, I think?) that
had a piezo beeper on the PCI card. Since it beeped every couple of
seconds whenever it was checking or rebuilding the array (which could
take several hours), it fairly quickly got a blob of Blu-Tak wedged
over it to make it a bit quieter.


And I do suppose you will be really upset if as some others have said,
the thing might be damaged.

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header above is
ignored unless my full name is included in the subject line. Or, you can
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