ClearOne Due Diligence findings and other matters

1. ClearOne Due Diligence findings and other matters 07/20/2005 Converge Pro Presentation June 2007

2. Introducing Converge™ Pro Series - Any Conference - Any Room - Any Media

3. ClearOne Solutions Portfolio Delivering superior audio performance in every conferencing space ProfessionalConferencing Converge Pro PremiumConferencing XAP TabletopConferencing Performance PersonalConferencing Chat 150 RAV 600 & 900 Converge 560 & 590 MAX IP, Wired, & Wireless 20-200 participants- Board rooms- Training rooms- Courtrooms- Multimedia rooms- Distance learning- Auditoriums- Houses of worship Chat 50 8-30 participants- Conference rooms- Multimedia rooms- Video conferencing- Small classrooms- Boardrooms 1-30 participants- Executive offices- Conference rooms 1-15 participants- Desktop- Executive offices- SOHO- Road warrior Price

4. Professional Conferencing product line – Converge Pro Series Key Benefits • Superior audio • ClearOne next generation algorithms • Field proven technology • Configuration flexibility • More models • Improved SR feature sets • Improved ease of use • Simplified programming • Reduced installation times • World-class customer service • Tech support • Field engineering • Certification training • The ultimate solution for large-scale audio applications Models • Converge Pro 880 • Converge Pro 840T • Converge Pro TH20 • Converge Pro 8i

5. Converge Pro Mixer Line – Channel Table

6. Converge Pro Key Features – Connections & Communications • USB (Type B) Front Panel Control – connect to Console configuration software • Dual Port Ethernet Connection • PC Port – directly connect to Console configuration software • Network Port – remote connection for administration & SNMP/SMTP functions • Dual Port RJ-45 Expansion Bus Connection • Time Division Multiplexed Mix/Minus audio and control slots • Improved speed • Expanded distance to 200 feet (61 meters) between units • RS-232 Port • Up to 155 Kbaud • Dedicated to 3rd-party control connection (cannot connect with Console software) • GPIO Ports • Dual Port DB-25 • Mini-Phoenix audio channels connectors • Color coded based on channel type • Differential inputs/outputs

7. Converge Pro Key Features – Signal Processing • Acoustical Echo Cancellation Feature Additions • Smoothing Filters to reduce artifacts • Automated Push-to-Talk microphone mode feature • AEC Freezing • Microphone Threshold • Pre AEC Channels • Bypasses AEC processing (4 msec maximum delay) • Mixer feature additions • Cross Point Gain for channel volume control • 4 Fader channels for simple mixes • Microphone Pre-Amp Gain • 7dB Sets for improved microphone gain matching • Automatic Gain algorithms • Automatic Level Control – fast-acting compander (compressor/expansion/ downward expander) – improved to eliminate noise floor pumping • Automatic Gain Control

8. Converge Pro Key Features – Signal Processing Processing flow diagram

9. Converge Pro Key Features – Signal Processing • Telco feature additions • Caller ID • Type I & Type II (US/EU) • Noise Cancellation on receive channel • ClearEffect algorithm • Receive Automatic Level Control (ALC) • G-Link (TH20) • Call Management/Processing additions • Ringer selection • Robust dial tone detection scheme • Improved ringer detection • International impedance matching • Off-Hook DTMF Generation

10. Converge Pro Key Features – new 8i input-only box • Features 8 mic/line inputs & 4 line inputs • Lower price point compared to Converge Pro 880 • Allows integrators to economically add more inputs without adding more outputs • More closely match number of inputs & outputs required

11. Microphone Channels

12. Microphone Channels • Acoustical Echo Cancellation • Tail Time: 130 msec • 4 Virtual Reference Buses • Selectable NLP - 6,12,18 dB • Noise Cancellation • Selectable 6-15dB • Effective on wideband sources • Pre-AEC Channel • Synchronized Controls • Additional 16msec delay if ALC enabled • Auto Gain Modes • AGC – Range: -30 to 20dB • ALC – Compander with adaptive knee • Filters • 4 Nodes • PEQ, LP, HP, AP, Notch

13. Input/Output Channels • Input Impedance: 5Kohm • Line Level • Adjustable AGC • Output Impedance: 50 ohm • Line Level • NOM Attenuation

14. Processing Channels • 8 or 4 processing channels • Filter bank • Cross-over (4 max): Butterworth, Linkwitz-Riley, Bessel • Other: LP, HP, HS, LS, Notch, All • Delay • 0-250 msec • Compressor • Adjustable targets, thresholds, attach • Compressor group control

15. Fader Channels • 4 channels on each unit • Simple mixes • Gain Control: -65 to +20 • Mute • Meter

16. Expansion Bus Channels • High speed TDM bus • Mix-minus bus structure • 12 mix bus channels • O-R : NOM • S-Z : Auxiliary Mix • 4 expansion bus reference • 4 global mixer groups • 1st mic priority • Max mics

17. Auto Mixer • Maximum Number of Microphones - 64 • 1st Mic Priority • Adaptive Ambient • PA Adaptive • Chairman Override • Gating Groups • 4 Internal Gating Groups • 4 External Gating Groups • 1st Mic Priority, Max Mics, Last Mic

18. Matrix Mixer • 24 x 24 I/O matrix • Mic channels selectable • Gated • Non-gated • Pre-AEC (gated) • Cross-Point Gain • -60 to +12 dB

19. Converge Pro Programming • Enhanced Views • Unit View • Route indications/table • Drag & drop A/V devices • High level audio controls • Channel View • Access to all signal processing • Set cross point • Channel object drag & drop • Database Builder • Create custom A/V devices or use ClearOne-defined devices • Create custom channel objects • Improved preset presentation • Automatically sets input row • Simplified check box on all frames

20. Converge Pro Configuration/Control • Presets – Configure full unit or individual areas • 32 Presets • Audio routes • Channel properties • GPIO • Macro • Macro – Create command scripts quickly • 255 Macros with ~150 commands each • Macro recorder • GPIO • Inputs: Active low • Outputs: Open collector, 40Vdc, 40mA • Power: +3.3V • Serial Command Activation (new) • Strings • 7 string-based command strings

21. Converge Pro – System Diagnostics • Improved signal generator • White/pink noise generator • Sweep generator • Selectable time-out • System checks • Telco verification • Microphone checks (based on AEC references) • Output checks • Clip/presence indications • Improved metering • Peak & hold indications • Faster streaming

22. Converge Pro – Management • Timed events • 12 per unit, obtain timing from NTP server or local clock • Simple Network Management Protocol (SNMP) agent • ClearOne MIB with traps & get/set • Interface with enterprise management consoles (HP OpenView) • Simple Mail Transport Protocol (SMTP) • Send emails to maintenance personnel on traps • Embedded web server • Remote maintenance from web pages • Audio control/monitoring of channels • Site wide dial & control page • Site firmware updates • Access from standard web browser • Control API improvements • GPIO status command • Delay command • System checks • Event/device logging

23. Converge Pro – Other • Convert/Compare utility • Converts XAP site files to Converge files • Compare Converge files for parameter differences • Firmware Updates • Point to Point mode • Point to Multipoint mode (Expansion Bus) • Update from Web or Console application • Security • Three access levels • Administrator, Maintenance, End User • Password verification • Front Panel Control • Channel Gain/Mute control • Configuration Settings • Preset & Macro execution

24. Converge Pro – Pricing

25. Converge Pro – Availability • Market beta units and beta software shipping – week of June 18 • Beta period ends – early August 2007 • Converge Pro production begins – early August 2007 • Converge Pro begins shipping – early September 2007

26. Demo Equipment Purchase Program Obtain a single Converge Pro at up to 65% off list price XAP to Converge Pro Upgrade Program Obtain attractive discount for trade-in of any ClearOne or competitive products when replaced with a Converge Pro equivalent Converge Pro Programs & Promotions

27. ClearOne Due Diligence findings and other matters 07/20/2005