Inexpensive audio white/pink noise source? - Page 1
Forum section: electronics / testgear

author: cvanc
author_rank: Frequent Contributor
timestamp: January 28, 2019, 07:26:48 pm
content: Hi all-Looking for a pre-made inexpensive audio noise source. Could be either new or vintage, just needs to work. Would like switchable white & pink noise if possible.I'm not finding much on eBay so I'm looking for ideas here. Thanks in advance for any suggestions you may have.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 28, 2019, 07:53:44 pm
content: or using the web,http://onlinetonegenerator.com/noise.htmlMartin

author: Richard Crowley
author_rank: Super Contributor
timestamp: January 28, 2019, 08:21:49 pm
content: In addition to @Martin.M's great suggestion, there is a Velleman kit, many DIY circuits, and inexpensive ($50-150) generators on eBay. Perhaps we don't know what your budget and/or DIY criteria are?

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 28, 2019, 08:32:51 pm
content: for homebrewing:in the old time there wasspecial tubes for controlling saturation reactors,they are a diode where the current is strong following the filament heating voltage,the heating is made from tungsten so they make a light like a bulb.This tubes deliver a fine white noise up to HF and higher.For example: 56001 from Philips, or american Kalotron TubesSpecial made noise tubes are still very expensive, they deliver a noise up to UHF, but I think this is here not required.Other way: sometimes to find in the bay is a noise generator from Rohde+Schwarz, its vintage and with a case made from steel, the instrument is calibrated to kTo.This is a perfect source for a smaller money.Martin

author: Wolfgang
author_rank: Super Contributor
timestamp: January 29, 2019, 08:11:48 am
content: Quote from: Martin.M on January 28, 2019, 08:32:51 pmYou can make a tube noise source by yourself, and the tubes are not expensive, like here:https://electronicprojectsforfun.wordpress.com/making-noise/noise-sources-i-have-built/a-tube-noise-source-using-the-2d3b-tube/Some bigger coupling caps, and you can use them for audio as well.

author: Fungus
author_rank: Super Contributor
timestamp: January 29, 2019, 08:59:35 am
content: Quote from: cvanc on January 28, 2019, 07:26:48 pmA PC and a copy of Audacity?You don't say what you want to connect it to or how you want to use it.

author: GregDunn
author_rank: Frequent Contributor
timestamp: January 29, 2019, 09:10:02 am
content: Room EQ Wizard (https://www.roomeqwizard.com/) will generate a multitude of useful audio waveforms, allow you to use a WAV file of your own creation, and even use the signal for analysis of amplifiers or speakers - in addition to its primary use as a room measuring and equalizing tool. It's free and is regularly updated by the author to maintain compatibility and functionality with the latest versions of (probably) your favorite OS.

author: santiall
author_rank: Contributor
timestamp: January 29, 2019, 10:45:35 am
content: can a mobile phone app work for your application?I've used some times one Android app called 'Dual Channel Function Generator' for quick stuff.

author: PaulAm
author_rank: Frequent Contributor
timestamp: January 29, 2019, 02:54:57 pm
content: The latest issue of Electronic Design had a very simple white noise generator in their Design column.