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How the Fluency VA601i works

Theory behind the VA601i

What causes stuttering? The Choral Effect, Altered Auditory Feedback and Edinburgh Masking Function.

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VA601i User Manual

Getting started with the VA601i, using the controls and indicators, and calibrating your device.

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Steps to fluency

Step by step guide allowing new users to explore the VA601i technology. It is a non-technical, hands-on approach.

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VA601i Data Sheet Specs

System overview, basic functionality, user interface, electrical specs, effect settings, firmware and schematics.

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Wireless Kit and Masking

Opting for the wireless kit ensures discretion while retaining the dynamic programmable power of the VA601i.

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VA601i Troubleshooting

Frequently asked questions are answered here to resolve queries you may have.

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DAF vs FAF

Delayed Auditory Feedback (DAF) compared to Frequency Altered Feedback (FAF)

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Clinical Trials

The VoiceAmp Fluency VA601i has participated in many clinical trials. Here are a few as reference.

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Support Organisations

Find a Speech Language Therapist or stuttering association that has partnered with VoiceAmp 

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Please tell us more. We would love to help.

You will also find more information and get directed to the pricing page


I stutter/ stammer i am a teacher/ colleage/ guardian I am a health professional

Message from Alan Falck

"Our passion at VoiceAmp is to lower the anxiety and reduce the severity of stuttering and voice strain for our customers. Our device has been subjected to many clinical trials and we have supplied devices for over 10 years. We look forward to connecting with you."

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Alan Falck
Founder of VoiceAmp

VoiceAmp is continually improving existing technologies and exploring new techniques to improve fluency. We value your feedback. For technical support, please contact us.

Technical Support


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