[xrox]

Didn't want to post this in the buzz poll as it concerns all PDPs not just Pioneer.


I've already posted that any high voltage AC device has the possibility of producing electrical buzzing or humming in the audible range. It is the nature of AC driving and the severity of the buzz is related to how loose the parts are which is related to the manufacturing tolerances. For Plasma displays this can come from the power supplies/transformers or other electrical parts than can vibrate together. It can also come from the glass of the panel. Evidence of this comes from the manufacturers mouths:

Quote:
Originally Posted by LG /forum/post/0

…systematic discharge creates a mechanical resonance, thereby causing a big noise to be generated at a particular resonance frequency.

Quote:
Originally Posted by LG /forum/post/0

… the porous pad or the porous sheet prevents the noise and vibration generated when the flat display panel is operated. In order to absorb the noise and vibration generated in the flat display panel, the porous pad or the porous sheet is made of porous material with a low density and a low hardness

Quote:
Originally Posted by LG /forum/post/0

… If any build-up of a material (for forming the partition wall assembly) are not avoided, when the front glass substrate and the rear glass substrate are brought together to form a display panel, the two glass substrates will get in contact with the build-up portions of the partition wall assembly while leaving the other portions thereof in a floating condition. Consequently, a vibration will happen on the substrates when the plasma display panel is being driven

Quote:
Originally Posted by Pioneer /forum/post/0

Typically, when a PDP initiates the address discharge, an electrostatic force is generated by a voltage applied to the row electrode on the front glass substrate and a voltage applied to the column electrode on the back glass substrate, and produces resonance on the front glass substrate and the back glass substrate resulting in vibration. However, in the PDP of the embodiment…….there is no possibility of an increase in physical energy being caused by the electrostatic force generated between the front glass substrate and the back glass substrate. In consequence, audible noise produced by the vibration of the substrates is prevented.

Quote:
Originally Posted by Samsung /forum/post/0

Table 1 below shows the results of noise measurements taken with this invention and with the conventional PDP of the same basic type (in the conventional PDP, the sealant is deposited at a uniform width throughout its entire length). It is clear from the results of Table 1 that the PDP of this invention generates significantly less noise than the conventional PDP. Frequency bandwidth Present Invention (dB) / Prior Art (dB) 2.0 kHz bandwidth 9.7 /15 2.5 kHz bandwidth 13.4 /20 3 15 kHz bandwidth 13.9 / 17.6 Entire audible sound 22 / 27.3 bandwidth (50 Hz. to about.8 kHz)

Quote:
Originally Posted by Samsung /forum/post/0

A discharge gas may be filled in the discharge spaces 26, and, during operation, a vibration may be continuously generated as the discharge pressure of the discharge gas periodically changes with the display discharge. However, in the conventional plasma display module, a vibration absorbing structure is not provided. Therefore, the vibration may be transmitted to the outside, causing audible noise.

 

[smalltownhick]

Has anyone has had somebody from Pioneer, or any other manufacturer, actually resolve their specific buzz problem?

 

[discopaul]



Quote:
Originally Posted by xrox /forum/post/12859946


Didn't want to post this in the buzz poll as it concerns all PDPs not just Pioneer.

At a certain point you're right but it seems Pioneer is having a problem with inordinately high levels of buzzing as reflected in the Pioneer buzz thread.

 

[yakbob]



Quote:
Originally Posted by smalltownhick /forum/post/12898438


Has anyone has had somebody from Pioneer, or any other manufacturer, actually resolve their specific buzz problem?

Probably not, but we'll sure hear about it from the Marketing department once someone does. It will most likely be listed as a "feature"... the Piosonic PZPDP50 runs amazingly quiet and will only cost you another couple grand over the giant electric razor just one model down. ;-)

 

[BriS2K]



Quote:
Originally Posted by discopaul /forum/post/12898931


At a certain point you're right but it seems Pioneer is having a problem with inordinately high levels of buzzing as reflected in the Pioneer buzz thread.

Pio owners are also less forgiving considering the premium price on those Kuro sets...

 

[RandyWalters]

Here's an older post from the archives that explained the cause of Panasonic's buzz - the poster said it's either an amplifier or a pre-amplifier....

http://archive2.avsforum.com/avs-vb/...d.php?t=615023

 

[ljtellef]

I just bought a Pio Elite 151 last week. I had buzzing - noticeable from 16 feet - and it was replaced today. The new set has quieter buzzing, but it's still there. I was all set to return it all and wait for the new Panny's, but this post looks like Panny has issues too. Plus the new Panny Neo panel looks just like similiar design to the Pio...which I think the fusing of the front glass is causing a lot of the problem...it resonates and creates on large focused speaker.

Thoughts?

 

[discopaul]



Quote:
Originally Posted by ljtellef /forum/post/15916603


I just bought a Pio Elite 151 last week. I had buzzing - noticeable from 16 feet - and it was replaced today. The new set has quieter buzzing, but it's still there. I was all set to return it all and wait for the new Panny's, but this post looks like Panny has issues too. Plus the new Panny Neo panel looks just like similiar design to the Pio...which I think the fusing of the front glass is causing a lot of the problem...it resonates and creates on large focused speaker.

Thoughts?

There's still Samsung and LG out there. Try swapping for one of those

 

[vinnie97]

switching for lesser PQ? Out of the question.

 

[sharpjunkie]



Quote:
Originally Posted by discopaul /forum/post/15916654


there's still samsung and lg out there. Try swapping for one of those

Quote:
Originally Posted by vinnie97 /forum/post/15916716


switching for lesser pq? Out of the question.

^^^^^^^^ +1

 

[suprememilo]

Probably returning my 51F8500 to Amazon due to buzzing, just can't get over it when I am watching at low volume at night from ~8ft away.

My 42G10 always buzzed but I got used to it, the buzz on the Samsung is even louder, don't understand how they couldn't figure this out how to fix this in the decade+ plasmas have been out.

 

[suprememilo]

Probably returning my 51F8500 to Amazon due to buzzing, just can't get over it when I am watching at low volume at night from ~8ft away.

My 42G10 always buzzed but I got used to it, the buzz on the Samsung is even louder, don't understand how they couldn't figure this out how to fix this in the decade+ plasmas have been out.

Probably getting a Vizio P series to tide me over until OLED, hope I am not too disappointed.