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A99II buzzing sound

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hitoro View Drop Down
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Post Options Post Options   Quote hitoro Quote  Post ReplyReply Direct Link To This Post Topic: A99II buzzing sound
    Posted: 28 April 2020 at 08:43
My A99II is making a buzzing sound when i put my ear to it. It likes the stabilization motor is constantly working. This is even when the image stabilization is set to off. It also looks like the battery is drained faster than in the past.

Is this sound normal ? The pictures are ok from my camera.

A99+VG|70-200G|sigma 30/1.4 EX|CZ 16-35|M 50/1.7|CZ 24-70/2.8|CZ 135/1.8|CZ 85/1.4|CZ 24/2|
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genf View Drop Down
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Post Options Post Options   Quote genf Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2020 at 09:28
I hear the same on my A99ii. Indeed it has nothing to do with image stabilization. However the sound suddenly stops when the live view image disappears due to inactivity time-out. On my camera this is set to 10 seconds. (I think this setting is called "Power Save Start Time" in the menu.)
Not sure what it is that we hear. An autofocus motor maybe?
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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2020 at 09:59
Well, I put my ear to my A99m2 and it did the same. I then put it to my A7r2 and it also did it.
Then I tried my A900, 77m2 and A6400 and neither did it.

Maybe it has something to do with the 42mp sensor.... Anybody with an A7r3?
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Post Options Post Options   Quote Dopol Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2020 at 12:21
A7Riii does is too
As does the RX10Miii and RX100Mv
It doesn't drain the battery, so I'm fine with it.
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Post Options Post Options   Quote hitoro Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2020 at 12:59
Al thanks for checking your camera's. It seems to be normal, so nothing is wrong with my camera .
A99+VG|70-200G|sigma 30/1.4 EX|CZ 16-35|M 50/1.7|CZ 24-70/2.8|CZ 135/1.8|CZ 85/1.4|CZ 24/2|
Tamron 90/2.8SP Macro|sony 70-400 SSM|


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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2020 at 13:04
Originally posted by hitoro hitoro wrote:

My A99II is making a buzzing sound when i put my ear to it. It likes the stabilization motor is constantly working. This is even when the image stabilization is set to off. It also looks like the battery is drained faster than in the past.

Is this sound normal ? The pictures are ok from my camera.

The floating 5-axis system needs to be powered even when stabilization is disabled. That's a disadvantage it has over the old 4-axis system, which can be centered and motionless without power.
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pegelli View Drop Down
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2020 at 13:16
Originally posted by addy landzaat addy landzaat wrote:

Maybe it has something to do with the 42mp sensor.... Anybody with an A7r3?


My A7Rii, A7ii all make a slight whirring sound when I press my ear against the LCD. Switching OSS/IBIS on or off or mounting a manual lens/removing the lens doesn't make any difference.

My A6000 and NEX6 and NEX5 all make a slight whirring sound when I press my ear against the LCD only when a lens with OSS is mounted, but it doesn't matter if OSS is switched on or not. They're completely silent with a non-OSS lens (like the 20/2.8) or no lens is mounted.



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Micholand View Drop Down
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Post Options Post Options   Quote Micholand Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2020 at 17:07
This is nothing fancy, just physics

This "acoustic noise" may be caused by the vibration of capacitors or due to coil noise when circuits are powered. Basic cause is that the components change their shape (expand or contract) under the application of an electric field (electrostriction - for caps), respectively process of magnetization (magnetostriction - for coils).
For example when an output ripple voltage is applied to a soldered chip monolithic ceramic capacitor, noise may occur because the circuit board is slightly deformed and "vibrates" due to the constantly changed shape of the cap and when this vibration cycle of the board reaches the audible frequency range (20 Hz - 20 kHz) of humans, a sound can be perceived by the human ear.
Also coils may produce acoustic noise when heavy currents are passed through them.

Then again the sensor shift mechanism where the sensor is hold into position by actuators might be another noise source as already stated.
/Michael

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Post Options Post Options   Quote owenn01 Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2020 at 18:12
Then again, when you get to my age and have mild Tinnitus, you won't hear anything.... What the ear can't hear, the mind can't worry over

Best regards, Neil.
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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2020 at 18:38
Next time use earplugs when you go to a concert and join us in baseless worries

It seems the sound is normal
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