Noise cancelling megaphone - Revision history

Bas at 09:06, 18 February 2016

2016-02-18T09:06:54Z

← Older revision		Revision as of 09:06, 18 February 2016
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	{{Project		{{Project
	\|Name= Noise Cancelling Megaphone		\|Name= Noise Cancelling Megaphone
	\|Status=~~Initializing~~		\|Status=Abandoned
	\|Contact= Walter		\|Contact= Walter
	}}		}}

Smeding at 18:24, 5 January 2013

2013-01-05T18:24:59Z

← Older revision		Revision as of 18:24, 5 January 2013
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	==Project info==		==Project info==
	Actually this is not so much a project as a concept. I'm not going to execute it, but if anyone is willing to actually do it I might help funding the components. If you do: please have it airbrushed appropriately and have it available for events such as hacker camps and Chaos Congress.		Actually this is not so much a project as a concept. I'm not going to execute it, but if anyone is willing to actually do it I might help funding the components. If you do: please have it airbrushed appropriately and have it available for events such as hacker camps and Chaos Congress.

			==Notes by smeding==
			I don't want to change the project myself, but here's my two cents: It's probably far cheaper and easier to implement the wanted effect using analogue electronics such as op-amps. It removes a lot of complexity from the signal processing chain, which should make it easier to get repeatable, wanted results.

Wvholst at 18:07, 5 January 2013

2013-01-05T18:07:32Z

← Older revision		Revision as of 18:07, 5 January 2013
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	==Concept==		==Concept==

			First, it is not really a proper noise cancelling megaphone, but more of a speech/music-jamming one. Have a troublesome source of sound shut of by broadcasting the sounds back, but only perceptably delayed.

	Ever encountered those useless type to cheap to buy a headset for their mp3-playing mobile? To add insult to injury their taste in music tends to be in the 'atrocious' part of the musical-taste-spectrum, often involving autotuned hip hop. This might be a solution.		Ever encountered those useless type to cheap to buy a headset for their mp3-playing mobile? To add insult to injury their taste in music tends to be in the 'atrocious' part of the musical-taste-spectrum, often involving autotuned hip hop. This might be a solution.

Wvholst at 17:57, 5 January 2013

2013-01-05T17:57:16Z

← Older revision		Revision as of 17:57, 5 January 2013
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	So if you have experience with Pure Data (http://puredata.info/) this may actually be trivial.		So if you have experience with Pure Data (http://puredata.info/) this may actually be trivial.

			==Project info==
			Actually this is not so much a project as a concept. I'm not going to execute it, but if anyone is willing to actually do it I might help funding the components. If you do: please have it airbrushed appropriately and have it available for events such as hacker camps and Chaos Congress.

Wvholst at 17:51, 5 January 2013

2013-01-05T17:51:58Z

← Older revision		Revision as of 17:51, 5 January 2013
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	*Doing the signal processing software, has anyone ported PureData to ARM yet?		*Doing the signal processing software, has anyone ported PureData to ARM yet?

	Oh yes, they [have\|http://www.synthtopia.com/content/2012/10/08/pure-data-running-on-the-25-raspberry-pi-computer/]!		Oh yes, they have: http://www.synthtopia.com/content/2012/10/08/pure-data-running-on-the-25-raspberry-pi-computer/!

			So if you have experience with Pure Data (http://puredata.info/) this may actually be trivial.

Wvholst at 17:50, 5 January 2013

2013-01-05T17:50:29Z

← Older revision		Revision as of 17:50, 5 January 2013
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	*Doing the signal processing software, has anyone ported PureData to ARM yet?		*Doing the signal processing software, has anyone ported PureData to ARM yet?

	Oh yes, they [have]http://www.synthtopia.com/content/2012/10/08/pure-data-running-on-the-25-raspberry-pi-computer/!		Oh yes, they [have\|http://www.synthtopia.com/content/2012/10/08/pure-data-running-on-the-25-raspberry-pi-computer/]!

Wvholst at 17:50, 5 January 2013

2013-01-05T17:50:00Z

← Older revision		Revision as of 17:50, 5 January 2013
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	*Getting a RasPi Model A, they're not available yet		*Getting a RasPi Model A, they're not available yet
	*Doing the signal processing software, has anyone ported PureData to ARM yet?		*Doing the signal processing software, has anyone ported PureData to ARM yet?

			Oh yes, they [have]http://www.synthtopia.com/content/2012/10/08/pure-data-running-on-the-25-raspberry-pi-computer/!

Wvholst: Created page with " {{Project |Name= Noise Cancelling Megaphone |Status=Initializing |Contact= Walter }} ==Concept== Ever encountered those useless type to cheap to buy a headset for ..."

2013-01-05T17:43:51Z

Created page with " {{Project |Name= Noise Cancelling Megaphone |Status=Initializing |Contact= Walter }} ==Concept== Ever encountered those useless type to cheap to buy a headset for ..."

New page

{{Project
|Name= Noise Cancelling Megaphone
|Status=Initializing
|Contact= Walter
}}

==Concept==

Ever encountered those useless type to cheap to buy a headset for their mp3-playing mobile? To add insult to injury their taste in music tends to be in the 'atrocious' part of the musical-taste-spectrum, often involving autotuned hip hop. This might be a solution.

Combine a directional microphone with a megaphone and a Raspberry Pi for the signal processing. Have the megaphone broadcast the sound collected through the directional microphone just a few milliseconds out of sync back to the source of your annoyance. Also works great on yapping dogs.

==Ingredients==

*Megaphone (about 30 USD on eBay)
*Directional microphone (also about 30 USD on eBay)
*Raspberry Pi, model A or B (model A goes supposedly for about 25 USD ex tax & shipping)

==Easy part==
*Integrating the hardware, probably involving a custom microphone holder (probably 3D-printer) and some epoxy
*Weather- and fool-proof RasPi case

==Hard part==
*Getting a RasPi Model A, they're not available yet
*Doing the signal processing software, has anyone ported PureData to ARM yet?