Gladius LED emit high pitch sound???

picard · Dec 8, 2006

Does anyone notice gladius LED light emit low volume high frequency sound ? I just found out today when I was using the light when my ears were just within 1-2 feet of the flashlight. It sounds light high pitch electrical noise.

Is my gladius defective ? or Am I just delusional? :grin2:

darb505 · Dec 8, 2006

My Gladius, SN 18xxx, emits that sound as well, but it's barely audible and doesn't concern me.

TorchMan · Dec 8, 2006

Mine has a faint, high pitch sound when on the brighter levels. It has to be within a foot of my ear to be noticeable. On lower light levels, I can't detect it.

JNewell · Dec 8, 2006

Have noticed this slightly with my Gladius, but also with the SF L2.

TigerhawkT3 · Dec 8, 2006

That's a well-known "issue" present in many lights. Don't worry, it'll fade away as you get older! :laughing:

picard · Dec 8, 2006

TigerhawkT3 said:
That's a well-known "issue" present in many lights. Don't worry, it'll fade away as you get older! :laughing:

Ok. you are saying that ears won't detect the sound when I get to be 90 right? :grin2:

Why does the LED light emit high pitch sound? I am curious. :popcorn:

:naughty:

xpitxbullx · Dec 8, 2006

My gladius doesn't make any buzz when I pressed it up to my ear.

My HDS U85 is another story.

Jeff

datiLED · Dec 8, 2006

picard said:
Does anyone notice gladius LED light emit low volume high frequency sound ? I just found out today when I was using the light when my ears were just within 1-2 feet of the flashlight. It sounds light high pitch electrical noise.

Is my gladius defective ? or Am I just delusional?

Your light is not defective, and you are not delusional, either. What you are hearing is most likely the ringing of the inductor in the DC regulation circuit.

Derek

TigerhawkT3 · Dec 8, 2006

Yep, that's the inductor. If you want a really noisy example, try a Streamlight Argo HP - and that's a headlight, so it's only a few inches away from the ears!

It is very common for people to lose high-frequency hearing first, worsening with age. This has been used to drive adolescent hooligans away from a high-class middle-aged-customer store, and also as a cell phone ringtone only audible to teens, and not teachers, along with other uses. YMMV, of course.

Gladius LED emit high pitch sound???

picard

Flashlight Enthusiast

darb505

Newly Enlightened

TorchMan

Enlightened

JNewell

Flashlight Enthusiast

TigerhawkT3

Flashlight Enthusiast

picard

Flashlight Enthusiast

xpitxbullx

Flashlight Enthusiast

datiLED

Flashlight Enthusiast

TigerhawkT3

Flashlight Enthusiast

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