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11/03/2007 Documentation
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Pocket DAF/FAF Assistant Documentation

 

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What's new

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Overview

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Revision History

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Requirements

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Pocket PC Selection

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Headphones and Microphone Selection

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Installation

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Bluetooth Headset Configuration

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Removing the program

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Using the program

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Warranty Disclaimers and Liability Limitations

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Related information

 

 

What's new

 

November 2007

Pocket DAF/FAF Assistant version 2.0 has been released.

 

March 2007

Added new HP iPAQ rx4200 and rx4240 PDAs to list of recommended devices.

 

January 2006

Added new DELL Axim x51 Pocket PC to list of recommended devices.

 

November 2004

Added new DELL Axim x50 Pocket PC to list of recommended devices.

 

December 2003

Pocket DAF/FAF Assistant version 1.0 has been released. 

 

Overview

 

The Pocket DAF/FAF Assistant is a software application that implements two altered auditory feedback techniques: Delayed Auditory Feedback (DAF) and Frequency Altered Feedback also called Frequency-shifting Auditory Feedback (FAF). These techniques are supposed to help people having stuttering problem to improve their speech fluency and gain additional self-confidence.

 

Altered auditory feedback simply means hearing your own voice in a manner that is slightly different from the way you normally hear it. Using DAF allows the user to hear his or her own voice with a small delay, similar to an echo. FAF allows the user to hear his or her own voice with a shift in the pitch, so the signal heard is either at a slightly higher or slightly lower pitch than the person's own voice.

 

For many years, it has been known that when people who have stuttering problem speak the same text simultaneously with another speaker (i.e. Choral Speech), they become fluent. The DAF/FAF Assistant allows the user to hear his or her own voice with a slight time delay and a pitch shift and creates the illusion of another speaker speaking at the same time.

 

 

Revision History

 
December 2003 Pocket DAF/FAF Assistant version 1.0 has been released. This version provides DAF and FAF implementation for the Pocket PC handheld computers. 
November 2007 Pocket DAF/FAF Assistant version 1.0 has been released. This version improves application usability a is designed to run on Windows Mobile 5.0 PDA

 

 

Requirements

 

bulletThe software application requires handheld (Pocket PC) computer running Windows Mobile 5.0 operating system. 

 

bulletFor better performance the application requires external headset (headphones and microphone).

 

 

Pocket PC Selection

 

The software will work on many handheld devices running Windows Mobile 5.0 operation system. The following devices are recommended for DAF/FAF Assistant software:

 

PDA External headset support (headphones + microphone) Bluetooth headset support Comments

HP iPAQ rx4200, rx4240

YES YES Recommended

 

Great handheld device supporting all headset configurations. This is probably one of the smallest devices available on the market. Excellent sound quality when used with the wired headset. 

 

We recommend to turn off the Microphone "AGC (Automatic Gain Control)" feature in "iPAQ Audio" configuration settings. Also, to increase the volume,  you may want to set the Mode to "Normal" and microphone sensitivity to "MAX". 

Dell Axim x51

 

YES

 

 

NO

 

 

Recommended

 

Great handheld device.

 

Please note that currently Dell Axim x51 does not support Bluetooth headsets. Dell and Microsoft are planning to release a patch to fix this problem. At this moment we recommend to use wired headset with Dell Axim x51.

624 MHz Axim X51v Handheld

 

Dell Axim x50

YES YES Recommended

 

Great handheld device supporting all headset configurations.  

 

HP iPAQ h5555

YES YES Recommended

 

Great handheld device supporting all headset configurations.

 

We would be very grateful if you let us know about any Pocket PC device that is compatible with the Pocket DAF/FAF Assistant software and is not on this list yet.

 

 

Headphones and Microphone Selection

 

The following headphones and microphone configurations can be used:

 

bulletFor models that support external microphone (HP iPAQ rx4200, Dell Axim x50, HP iPAQ h5555) use external headset (microphone and headphones). You can use either special headset that is designed for PDA (see examples below) or use any standard cell phone headset and purchase a special adapter (see below). We recommend to use high quality headsets from well known companies (Jabra, Plantronics). Recommended

 

bulletUse external headphones and internal microphone. Most of the handheld devices have sensitive internal microphones that are able to pick up your voice quite well.

 

bulletUse Bluetooth (wireless) headset. The Bluetooth headset allows you greater flexibility because it does not use any wires but can degrade sound quality. Please make sure that your Pocket PC supports Bluetooth headset profile. We recommend to use high quality headsets such as Plantronics Voyager(tm) 510 Bluetooth headset or Jabra Free Speak. 

 

Please note that different Pocket PC devices have different size of headphone jacks. Currently there are two standards 2.5 mm (cell phone headset standard) and 3.5 mm (Pocket PC jack standard). 

 

This adapter made by Plantronics(TM) can be used to connect your 2.5 mm standard cell phone headset to 3.5 mm input connection of PDA. This adapter is available at: http://www.plantronics.com/ipaq

 

This headset made by Plantronics(TM) can be used directly with Pocket PC. It includes headphone for one ear and a microphone. The headset has 3.5 mm jack. This headset is available at: http://www.plantronics.com/ipaq

For Pocket PCs that do not provide external microphone input you can use any computer compatible headphones. Bluetooth (wireless) headsets are compatible with the application. Please make sure the PDA supports Bluetooth headset profile.

 

 

Installation

 

To install the software you have to connect your Pocket PC computer to the desktop PC (or laptop) using ActiveSync software that comes with the Pocket PC.  When AcitveSync connection is established run the Pocket DAF/FAF Assistant installation program:

 

 

Press Next button to continue.

 

 

 

You will have to accept the license agreement and press Finish button.

 

Follow the instructions from ActiveSync software. Wait until installation process is competed. Now you can disconnect your Pocket PC from the desktop computer. You will find the Pocket DAF/FAF Assistant icon in the Programs folder of your Pocket PC.

 

 

When you start the application from your Pocket PC you will see the trial version information message. If you have registration key please press Register button and enter your User Name and Key. If you wish to continue with the trial version please press Continue button. If you press Registration button either from the trial version information window or from the main application window the following registration dialog will be displayed. Please enter User Name and Key that you received when purchased the software and press OK button.

 

 

Bluetooth Headset Configuration

 

Most of Pocket PC devices support wireless connections based on Bluetooth technology. Bluetooth allows to swap files, exchange data between devices, connect PDA to mobile phone, connect Bluetooth headsets. Please note that not all PDAs support Bluetooth headsets. It depends of whether your PDA supports so called Bluetooth headset profile.

 

Follow these steps to configure your Bluetooth Headset:

 

bulletTurn on your Pocket PC.
bulletIn the main window (when all applications are closed) there is an icon in the right bottom corner of the screen. Click on it and select "Bluetooth Manager". This will launch the Bluetooth configuration program.
bulletIn the left bottom corner click "New->Connect".
bulletIf your Pocket PC supports Bluetooth headset profile you will see "Connect a headset" item in the list. Select "Connect a headset" and click "Next".  
bulletSwitch your headset into "pairing mode". You might need to check with the headset documentation on how to switch your headset into the "pairing" mode. Usually you need to press "On" button on your headset while it is OFF and hold it for 5-7 seconds.
bulletClick "Next" button on your Pocket PC screen. The Pocket PC will start scanning around trying to connect to your wireless headset. 
bulletYou may need to click on Refresh button on your Pocket PC to restart scanning again if it did not find the headset at first time.
bulletThe headset icon should appear on your Pocket PC. Click this icon and the Pocket PC will ask you for default authorization code. Most headsets have default code of 0000. You might need to verify this with headset documentation.
bulletClick Finish to create an icon. 
bulletTurn off "pairing mode" on your headset. Usually you need to click the "On" button again.
bulletThis will complete the configuration of your headset.
bulletNext time when you turn on your Pocket PC you will have to click the icon in the right bottom corner of the screen and select "Turn Bluetooth ON". Then you will need to turn on your headset by pressing headset On button. The Pocket PC will automatically recognize and connect to your headset. Pocket PC will display message box asking you to Accept Or Deny the connection. You will have to accept the headset connection. Then your headset will be connected.

 

To test the headset select Windows Media program from the menu and press Play button. You should hear the sound in your headset.

 

Please note that currently Dell Axim x51 does not support Bluetooth headsets. Dell and Microsoft are planning to release a patch to fix this problem in the nearest future..

 

 

Removing the program

 

To uninstall the Pocket DAF/FAF Assistant connect the Pocket PC to your desktop PC (or laptop) using the ActiveSync software. From ActiveSync application select Tools->Add/Remove Programs menu item. Select Pocket DAF/FAF Assistant item in the list. Press Remove button. 

 

 

Using the program

 

You can start using the Pocket DAF/FAF Assistant with basic reading exercises. Set the delay value to 50-70 ms and the frequency pitch shift to +/-5 and start reading aloud. You should see noticeable speech improvement. Several researches show that short delay (approximately 50 milliseconds) and/or a moderate frequency shift (approximately one-half octave) immediately reduce stuttering about 75%. Try to work with different delays and frequency shifts to find the optimal values that provide the best fluency for you.

 

When you are comfortable with the basic reading skills you may want to start experimenting with Pocket DAF/FAF Assistant in many different situations. Try to use it when you are reading to someone, speaking with close friends or family members, talking on the phone, doing public presentations. 

 

You can create your own schedule of exercises or contact your speech-language pathologist to discuss the possible ways of incorporating the DAF/FAF techniques into your speech therapy.

 

You can find more about DAF/FAF techniques in the book 'No Miracle Cures: A Multifactoral Guide to Stuttering Therapy' (free full-text download). 

 

If you feel that you need a professional speech therapy advice please consult with your speech-language pathologist.

 

 

The Pocket DAF/FAF Assistant interface is simple and intuitive. There are two gauge controls that are responsible for setting Delay and Frequency Shift. The Delay has the range of 50 ms to 250 ms. The Frequency Shift has the range of -10 to +10 which corresponds to +/- one-half octave. These intervals are widely used in DAF/FAF speech therapy. 

 

The DAF/FAF Assistant automatically saves configured Delay and Frequency Shift settings when you close the program and restores these settings back when you start the application.

 

The Start and Stop buttons turn on and off the sound playback. 

 

The Register button allows you to enter your registration name and key. When the software is registered this button is hidden.

 

Options button allows user to configure various application parameters including Noise threshold, Auto Start, Auto DAF delay reset, etc.

 

 

 

Warranty Disclaimers and Liability Limitations

 

The DAF/FAF Assistant and any and all accompanying software, files, data and materials, are distributed and provided “AS IS” and with no warranties of any kind, whether express or implied and you hereby assume the entire risk of using the Software. This disclaimer of warranty constitutes an essential part of this License. 

Any liability of Artefact, LLC will be limited exclusively to refund of purchase price, if any. In addition, in no event shall Artefact, LLC or its owners, principals, shareholders, officers, employees, affiliates, contractors, subsidiaries, or parent organizations, be liable for any indirect, incidental, consequential, or punitive damages whatsoever relating to the use of DAF/FAF Assistant, or to your relationship with Artefact, LLC.

In addition, in no event does Artefact, LLC authorize you to use DAF/FAF Assistant in applications or systems where DAF/FAF Assistant's failure to perform can reasonably be expected to result in a significant physical injury, or in loss of life. Any such use by you is entirely at your own risk, and you agree to hold Artefact, LLC harmless from any and all claims or losses relating to such unauthorized use.

 

 

Related information

 

Electronic devices and stuttering treatment. By Judy Kuster.

 

Using Electronic Devices to Treat Stuttering. By Casa Futura Technologies.

 

 

 

 

 

 

 
   
 

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