This version of Multitalker Noise -20 Talkers© was developed by Tom Frank. Twenty young adults were recorded simultaneously reading different passages. It is a babble, obviously speech, but completely unintelligible so that it is less likely to be a semantic distracter than Four Talkers, a single talker or perhaps cafeteria noise. The level is remarkably stable over time.
The Multitalker Noise – 20 Talkers© (Frank Version) includes the audio recording only. This product does not include instructions or normative data. It is assumed that purchasers of Auditec’s products are well trained in their use, purpose, and interpretation.
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Multitalker Noise – 20 Talkers© (CD Format); Item 146; Price $62.75 USD + S&H 
Multitalker Noise – 20 Talkers© (USB Format); Item USB146; Price $68.75 USD + S&H
Auditec, Inc. 