Re: Two Tone Generator #two-tone


Ashhar Farhan
 

The often neglected requirement of a two tone generator is that it should have very very low distortion of its own. 
Let's imagine that you have a 2 tone generator with 1% distortion. This would be considered modestly good in audio work. However, this distortion in power terms is just -40dbc. Effectively, you will not get any useful measurements beyond about -35 dbc.
The modern sound cards on laptops are equipped with 24-bit sound cards that have more than 16 bits of useful range. They can generate very clean audio.
- f

On Sun 31 Mar, 2019, 12:23 AM K5ESS via Groups.Io, <k5ess.nothdurft=verizon.net@groups.io> wrote:
As mentioned in a previous posts by Farhan and Raj there is an online generator that can provide two tones for testing.  http://www.onlinetonegenerator.com/binauralbeats.html.
However if you would like to build your own there is an article in the latest QEX by Phil Salas AD5X describing a two tone generator fabricated from two Wien bridge oscillators that are available from Ebay.  I've put together a PDF that describes the generator for those that might want to build one but don't have access to QEX.
Mike
K5ESS

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