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Date:	Tue, 28 Jul 2015 14:58:37 -0400
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Subject:	Re: [geda-help] Strategy of adding netname attributes in gSchem?
From:	"Evan Foss (evanfoss AT gmail DOT com) [via geda-help AT delorie DOT com]" <geda-help AT delorie DOT com>
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On Tue, Jul 28, 2015 at 12:40 PM, Csányi Pál (csanyipal AT gmail DOT com)
[via geda-help AT delorie DOT com] <geda-help AT delorie DOT com> wrote:
> 2015-07-28 17:55 GMT+02:00 Evan Foss (evanfoss AT gmail DOT com) [via
> geda-help AT delorie DOT com] <geda-help AT delorie DOT com>:
>> On Tue, Jul 28, 2015 at 11:42 AM, Csányi Pál (csanyipal AT gmail DOT com)
>> [via geda-help AT delorie DOT com] <geda-help AT delorie DOT com> wrote:
>>> 2015-07-28 16:41 GMT+02:00 Evan Foss (evanfoss AT gmail DOT com) [via
>>> geda-help AT delorie DOT com] <geda-help AT delorie DOT com>:
>>>> I don't mean to stomp on your dreams but there is an ethical concern
>>>> here. You are very likely to harm bats. 60KHz is the centre of here
>>>> hearing frequency.
>>>
>>> I agree with you.
>>>
>>> I think: a quiet music could be nice, but a loud music could be
>>> harmful to peaple.
>>> This may be similar to bats, don't you think?
>>
>> That is not how it works plus your device basically makes a pure tone
>> not music. I work for people who study hearing loss.
>>
>>> I read somewhere that that some mosquitos are able to produces sound
>>> frequencies of 60 kHz, when they mate.
>
> I think if I repell mosquitoes from the place where I am, then bats
> goes after mosquitoes ( to eat them ) so I am going to be free of
> mosquitoes as well.

You are assuming a number of things here.
1. That the bats hearing will let them know over the din you are
adding that the mosquitos have moved. They do after all use their
hearing to do that.
2. That your device is not going to be harmful in shorter exposure times.
3. That the sound from your device will not propagate to the bat. If
there is a mistake I have made it would be in this one and that would
not be the first time. I am not an acoustics engineer. If you can tell
me that bats that live near your area I can ask around to find out
what their lower threshold is.

>> Yes and that is part of why bats use that frequency.
>>
>>> This could be music for bat's ears if it is quiet, don't you think?
>>
>> More likely it will add to their already noise polluted environment.
>
> So what is your suggestion about this device called mosquito
> repellent? How could it bee environmentally friendly for baats and for
> as, humans?

I just change to loose fitting clothing.

> --
> Regards from Pál
>



-- 
Home
http://evanfoss.googlepages.com/
Work
http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/

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