Knowles V2S200D User manual

V2S200D Evaluation Kit –
Quick Start Guide
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DESCRIPTION
The V2S200D Evaluation Kit allows for basic evaluation of Knowles Voice Vibration Sensor (V2S) along with a SiSonic™
Digital MEMS microphone in an Earbud form factor, a V2S sensor wire assembly, and a V2S & Mic stereo wire assembly.
For more information, visit https://www.knowles.com/V2S, email us at [e-mail], or contact Knowles representative.
IN THE BOX
1. PDM to USB signal conversion audio streaming box
2. Earbud instantiating V2S200D sensor and a MEMS
microphone (SPC18P8LM4H-1 Marina)
3. Sensors on wires:
oV2S and mic stereo assembly
oV2S mono assembly
4. USB cable
5. USB hub
HARDWARE SETUP
•Plug-in Earbud or wired assembly connector to the
streaming box, aligning the “P O G” labels on both ends
•Connect the streaming board to a PC using a
USB cable. Recommended to use USB hub
•Move the dip switch to a desirable PDM
clock rate (non-OFF)
GETTING STARTED
•V2S200D Evaluation kit will be recognized by PC as an
external USB recording device. No special driver is needed
to start
the recording.
•Supported operating system: Windows PC
•When making stereo recording, The Left channel on the
recording will contain V2S sensor vibration data and the
Right will contain
microphone audio data.
•Any commercial audio software can be used to evaluate
the kit. Alternatively, Knowles V2S evaluation GUI software
is available for a simple testing.
•Connect signal conversion streaming box to your PC with
provided USB cable. Note: the USB hub (included) can be
used to avoid laptop compatibility issues where constant
high noise is present on the recording.
•Make sure Clock Switch is ON.
•Please contact Knowles if you face signal integrity issues
when using V2S evaluation kit
The intended use of all tools and software discussed
here is to support R&D activities, and is not intended
for qualification or production test use
V2S SENSOR SOFTWARE GUI TOOL
Optional software GUI tool to aid in sensor
evaluation. Please download and install from the
Knowles V2S Webpage http://www.knowles.com/V2S
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P O G
alignment
Clock
switch
DISCLAIMER
The information given in this document shall in no event be regarded as a guarantee of conditions
or characteristics. With respect to any examples given herein, any typical values stated herein
and/or any information regarding the application of the device, Knowles Electronics, LLC hereby
disclaims any and all warranties and liabilities of any kind, including without limitation warranties of
non-infringement of intellectual property rights of any third party.
INFORMATION
For further information on technology, delivery terms and conditions and prices,
please contact a Knowles representative.
© 2024, Knowles Electronics, LLC, Itasca, IL USA. All Rights Reserved.
Knowles and the logo are trademarks of Knowles Electronics, LLC.
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V2S200D Evaluation Kit –
Quick Start Guide
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V2S SENSOR SOFTWARE GUI TOOL
V2S200D evaluation kit comes with several software programs. Various V2S sensor applications are covered with several GUI software
programs. Please refer to the table below to identify the right program for your application. Installers for each program are available
inside ZIP archive upon download from Knowles V2S Webpage http://www.knowles.com/V2S
For more information, visit https://www.knowles.com/V2S, email us at [email protected], or contact your nearest
Knowles representative.
DISCLAIMER
The information given in this document shall in no event be regarded as a guarantee of conditions
or characteristics. With respect to any examples given herein, any typical values stated herein
and/or any information regarding the application of the device, Knowles Electronics, LLC hereby
disclaims any and all warranties and liabilities of any kind, including without limitation warranties of
non-infringement of intellectual property rights of any third party.
INFORMATION
For further information on technology, delivery terms and conditions and prices,
please contact a Knowles representative.
© 2024, Knowles Electronics, LLC, Itasca, IL USA. All Rights Reserved.
Knowles and the logo are trademarks of Knowles Electronics, LLC.
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Program name General surface demo Mobile Earphone mode TWS
V2S application
(devices)
Car panel
TV
Laptop Screen
Tablet
Smartphone in speakerphone mode
TV remote
Smartwatch
Any wearable device with
good contact to head
Mobile in Earphone mode
Helmet
TWS or OWS
wireless headset
Purpose
Sensing sound-induced vibrations
from any object under impact of
falling audio wave
Sensing speech vibration via direct head contact
when user is talking
V2S value proposition
Picking up audio without sound port –
maximum environmental robustness
against contamination (water, dust,
ect
.). Advantage over microphone
–
protection via sealed consumer device
enclosureю
Selectively picking up self
-
voice while rejecting external noise
from wind, traffic, chatter, etc
Sensor input in GUI Only V2S sensor V2S sensor and mic for reference comparison
Recommended sensor
to use in the kit
V2S sensor on flex attached to sensing
surface
Stereo flex assembly V2S
sensor + mic channel for
reference attached to
wearable device
TWS prototype included or
Stereo assembly (V2S+mic)
Notes
GUI features:
EQ (equalization) to compensate for
sensor resonance and noise
suppression
Use in applications with tight
contact with user body. Full
speech bandwidth pickup via
V2S vibration sensor
Use in applications with
imperfect body contact (ex.:
TWS rubber eartip
). Speech
pickup via V2S vibration
sensor limited to lower
frequency range

V2S200D Evaluation Kit –
Quick Start Guide
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General Surface Demo: evaluation software for sound-induced vibrations
Automotive and consumer applications
Sensing sound-induced vibrations from any object under impact of falling audio wave. Picking up audio without sound port –
maximum environmental robustness against contamination (water, dust, ect.)
DISCLAIMER
The information given in this document shall in no event be regarded as a guarantee of conditions
or characteristics. With respect to any examples given herein, any typical values stated herein
and/or any information regarding the application of the device, Knowles Electronics, LLC hereby
disclaims any and all warranties and liabilities of any kind, including without limitation warranties of
non-infringement of intellectual property rights of any third party.
INFORMATION
For further information on technology, delivery terms and conditions and prices,
please contact a Knowles representative.
© 2024, Knowles Electronics, LLC, Itasca, IL USA. All Rights Reserved.
Knowles and the logo are trademarks of Knowles Electronics, LLC.
Screen 1: Recording
Screen 2: Data analysis
Requirements:
In order to run V2S software tool installation of Matlab
Runtime 2023b or later is required
Recording:
1. Connect evaluation kit hardware
2. Use V2S sensor on wires assembly (included)
3. Attach V2S sensor to desired surface with tape
4. Start the GUI software
5. Select input device. Knowles evaluation kit shows up
on PC as KN BPs USB Audio Class
6. Select output device for sound playback
7. Select recording duration. Above 30 sec is not
recommended
8. Gain can be adjusted –applied on next screen during
post-processing
9. Hit Record button. Button turns red during recording
10. Allow 0.5sec for noise-suppression algorithm to adopt
11. Start speaking
12. When recording is completed, raw data is displayed on
time-domain chart and spectrogram is shown. No post-
processing is applied to data on this screen
13. Play button can be used to hear recorded data. Note:
no gain is applied at this step, expect very soft
playback
14. Press Process to go to the next screen
Listening and data analysis:
1. 3 options with different post-processing are displayed.
Each includes time-domain view and frequency
domain-view
•Raw Data –Gain applied. Data is scaled according to
gain setting on recording screen. Limited to +/-1D peak
value
•EQ applied –Resonance peak removed. A notch filter
is applied to do data from previous step in order to
compensate for sensor resonance in 7kHz region.
High-frequency noise hiss should be reduced
•Noise suppression applied –basic noise suppression
algorithm is applied to the data from previous step.
Uses initial 0.5sec of the recording to establish noise
mask.
2. Press Play button to hear the data with corresponding
processing. Note: gain is applied, please use caution
when listening in headphones to avoid hearing damage
3. Press Export button to save recorded and processed
files on your PC. File location will match with folder
where GUI software is installed
4. Press Return to go back to the recording screen

V2S200D Evaluation Kit –
Quick Start Guide
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Mobile Earphone mode Demo: evaluation software for devices with good head contact
Wearable devices and smartphones
Sensing speech vibration via direct contact when user is talking. Sound isolation from loud external signals: wind, traffic noise, chatter.
Use in applications with tight contact with user body. Full speech bandwidth pickup via V2S vibration sensor
DISCLAIMER
The information given in this document shall in no event be regarded as a guarantee of conditions
or characteristics. With respect to any examples given herein, any typical values stated herein
and/or any information regarding the application of the device, Knowles Electronics, LLC hereby
disclaims any and all warranties and liabilities of any kind, including without limitation warranties of
non-infringement of intellectual property rights of any third party.
INFORMATION
For further information on technology, delivery terms and conditions and prices,
please contact a Knowles representative.
© 2024, Knowles Electronics, LLC, Itasca, IL USA. All Rights Reserved.
Knowles and the logo are trademarks of Knowles Electronics, LLC.
Screen 1: Recording
Screen 2: Data analysis
Requirements:
In order to run V2S software tool installation of Matlab Runtime
2023b or later is required
Recording:
1. Connect evaluation kit hardware
2. Use wired assembly: V2S sensor and microphone for
reference (included)
3. Using tape attach V2S sensor to the device in optimal
location to pickup vibrations
4. Using Tape attach microphone to the device to record
reference sound for comparison. Make sure not to cover
the porthole
5. Start the GUI software
6. Select input device. Knowles evaluation kit shows up on
PC as KN BPs USB Audio Class
7. Select output device for sound playback
8. Select recording duration. Above 30 sec is not
recommended
9. Hit Record button. Button turns red during recording
10. Allow 0.5sec for noise-suppression algorithm to adopt
11. Start speaking. Wind noise test recommended to observe
V2S advantage
12. When recording is completed, raw data is displayed on
time-domain chart and spectrogram is shown. No post-
processing is applied to data on this screen
13. Play Mic and Play V2S buttons can be used to hear
recorded data. Note: no gain is applied at this step, expect
very soft playback
14. Press Process to go to the next screen
Listening and data analysis:
1. 4 options with different post-processing are displayed.
Each includes time-domain view and frequency domain-
view
•Microphone data for reference
•Raw Data –Gain applied. Data is scaled for comfortable
listening.
•EQ applied –Resonance peak removed. A notch filter is
applied to do data from previous step in order to
compensate for sensor resonance in 7kHz region. High-
frequency noise hiss should be reduced
•Noise suppression applied –basic noise suppression
algorithm is applied to the data from previous step. Uses
initial 0.5sec of the recording to establish noise mask.
2. Press Play button to hear the data with corresponding
processing. Note: gain is applied, please use caution
when listening in headphones to avoid hearing damage
3. Press Export button to save recorded and processed files
on your PC. File location will match with folder where GUI
software is installed
4. Press Return to go back to the recording screen

V2S200D Evaluation Kit –
Quick Start Guide
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TWS Demo: evaluation software for wireless TWS and OWS headsets
Sensing speech vibration via direct contact when user is talking. Sound isolation from loud external signals: wind, traffic noise, chatter.
Use in applications with imperfect body contact (ex.: TWS rubber eartip). Speech pickup via V2S vibration sensor limited to lower
frequency range
DISCLAIMER
The information given in this document shall in no event be regarded as a guarantee of conditions
or characteristics. With respect to any examples given herein, any typical values stated herein
and/or any information regarding the application of the device, Knowles Electronics, LLC hereby
disclaims any and all warranties and liabilities of any kind, including without limitation warranties of
non-infringement of intellectual property rights of any third party.
INFORMATION
For further information on technology, delivery terms and conditions and prices,
please contact a Knowles representative.
© 2024, Knowles Electronics, LLC, Itasca, IL USA. All Rights Reserved.
Knowles and the logo are trademarks of Knowles Electronics, LLC.
Screen 1: Recording
Screen 2: Data analysis
Requirements:
In order to run V2S software tool installation of Matlab Runtime
2023b or later is required
Recording:
1. Connect evaluation kit hardware
2. Use TWS prototype included in the kit with V2S sensor and
microphone integrated. Alternatively, use wired assembly:
V2S sensor and microphone on wires
3. Start the GUI software
4. Select input device. Knowles evaluation kit shows up on PC
as KN BPs USB Audio Class
5. Select output device for sound playback
6. Select recording duration. Above 30 sec is not
recommended
7. V2S only LPF setting controls low-pass filter cutoff
frequency for V2S channel listening on the next screen
8. Blend setting controls frequency for mixing V2S data in low
range with microphone data in high range on next screen
9. Hit Record button. Button turns red during recording
10. Allow 0.5sec for noise-suppression algorithm to adopt
11. Start speaking. Wind noise test recommended to observe
V2S advantage
12. When recording is completed, raw data is displayed on
time-domain chart and spectrogram is shown. No post-
processing is applied to data on this screen
13. Play Mic and Play V2S buttons can be used to hear
recorded data. Note: no gain is applied at this step, expect
very soft playback
14. Press Process to go to the next screen
Listening and data analysis:
1. 4 options with different post-processing are displayed. Each
includes time-domain view and frequency domain-view
•Microphone data for reference
•V2S Low Pass filter. Data is scaled for comfortable
listening. Low pass filter applied from the setting on
recording screen
•V2S Low Pass filter with noise supression. Basic noise
suppression algorithm is applied to the data from previous
step. Uses initial 0.5sec of the recording to establish noise
mask.
•V2S LPF + Mic HPF. Low-frequency V2S data is mixed
with high-frequency mic data according to Blend setting
from previous screen
2. Press Play button to hear the data with corresponding
processing. Note: gain is applied, please use caution when
listening in headphones to avoid hearing damage
3. Press Export button to save recorded and processed files
on your PC. File location will match with folder where GUI
software is installed
4. Press Return to go back to the recording screen