Noise Cancellation

Noise Cancellation stops ambient room noise from being picked up by the microphones on the conference phone. Noise Cancellation is also known as Active Noise Control or Active Noise Reduction (ANR) or antinoise. It is process of prohibiting unacceptable sound. Sound made up of pulse in the air which can be express as wave. If a speaker emits a sound whose wave has the same amplitude and the exact opposite polarity to the original sound, the waves cancel out and the result is no sound at all.

Noise cancellation device uses a microphone to pick up waves from a noise medium. The output of the microphone is assign to a computerized signal processor, which produces a waveform which is similar to the original one, but it is 180 degree out of phase. This amplified out of phase signal is directed back towards the noise source through speaker phone. When these both sound waves combines, they cancel out each other & this cause reduction in noise.

HVAC systems, projectors, laptops & fluorescent lights are some of the examples of ambient noise sources. ClearOne uses a spectral content analysis technique which separates a communicator's voice from ambient noise and only applies noise cancellation to ambient noise sources.

For more information please visit http://www.clearone.com

Echo cancellation

During a conference call one of the challenge is to eliminate acoustical echo & delivering good sound quality.The term Echo Cancellation is used in telephony to explain the method of eliminating echo from a voice communication so that better voice quality will be recieve on phone calls.

Echo Cancellation can be defined by many ways, such as:-

• The method of removing the acoustic echo in a video conferencing room.
• A technique used in high-speed modems and voice circuits to isolate and filter out unwanted signal energy caused by echoes from the main transmitted signal.

In Echo Cancellation the originally transmitted signal that re-appears, with some delay are recognized, in the recieved signals. Once we can recognized the echo, we can eliminates from the the recieved signals. This approach is mainly implemented by using Diginal Signal Processor (DSP), it can also be implemented using software i.e echo suppressors or echo cancellers.

Due to Echo Cancellation the person hear his own voice with an Echo. This Distributed Echo Cancellation problem is solved by ClearOne. They solve this problem by assigning an acoustical echo canceller to each microphone. This echo canceller recognises the sound and returned it to other end as an echo and removes it.

In the year 1998 ClearOne introduced the Distributed Echo Cancellation and integrates it into every audio conferencing system.

Professional Audio Conferencing

ClearOne is a premier worldwide provider of excellent professional audio conferencing systems& other related products for audio, video & web conferencing applications. The integity, adaptability & performance of our absolute solutions save organizations time & money by creating familiar environment for productive & economical group communication.

ClearOne has a wide range of professional audio conferencing products which has powerful & high quality audio, that are the heart of every wellknown conferencing system. By selling 75000+ professional audio conferencing systems sold, ClearOne gained a reputation as the industry leader in high-end audio conferencing.ClearOne's professional audio conferencing products are highly developed & fully featured. Unique audio performance has made ClearOne the acknowledged best choice for boardrooms, convention centers, distance learning facilities, courtrooms and other multi-use conference rooms.

The list of professional audio conferencing products provided by ClearOne are listed below:-

• XAP 800 — It is the ultimate audio management platform for conferencing and sound reinforcement applications. It delivers market-leading audio processing performance for large-scale, installed audio systems.
• XAP 400 — This combines the features of the XAP 800 with a single-line telephone interface and a 10W amplifier to create a stand-alone teleconferencing system.
• XAP TH2 — This adds telephone conferencing capabilities to the XAP 800. Link multiple XAP TH2 units to conference additional phone lines.
• Converge 560 — This audio conferencing system is for medium-sized room applications requiring up to six microphones. Includes audio mixer with telephone interface and 10W amplifier, wired or wireless controller, and two microphone distribution boxes with three XLR connectors per box.
• Converge 590 — It has same capabilities and components as Converge 560, but includes three distribution boxes for capability of up to nine microphones.

Source

VoIP Conference Phone

ClearOne's AccuMic VC and PC are true plug-and-play echo and noise canceling microphones that provide superior audio pickup for video and computer-based conferencing.

For web conferencing applications, AccuMic PC is a perfect complement. Most PCs don't come with any type of microphone, and typical inexpensive PC microphones deliver poor audio quality to the far end. AccuMic PC provides patented ClearOne audio processing technologies to deliver crystal clear audio to participants on the call.

VoIP Conferencing Phones products

• AccuMic PC - It is a new AccuMic(TM) PC that connects to a personal computer.




• AccuMic VC - It is an echo-cancelling microphone that connects to a set-top video codec.



• Button Mic - For unobtrusive tabletop placement of microphones



• Delta Mic - Accentutates teleconferencing applications that demand high quality audio



• Tabletop Mic - For conference tables that require minimal visibility microphones.

Advantages of ClearOne's VoIP Conferencing Phone

• Distributed Echo Cancellation - During the conference call delivering good quality sound is difficult when acoustical echo arises.The problem exists in any communications scenario where there is a speaker and a microphone.ClearOne's VoIP Conferencing Phone solve this problem by assigning acoustical echo canceller to each microphone.This echo canceller identifies the sound that would alternatively return back to the far end as echo & eliminates it.



• Noise Cancellation - ClearOne's VoIP Conferencing Phone aims to rectify the noise cancellation technology i.e overflow of noise which we experience.ClearOne's spectral content analysis technique differentiates a person's voice from ambient noise. This VoIP Conferencing Phone cancel unacceptable ambient sound that allowing listener to focus solely on the sound.



• First Microphone Priority - When multiple microphones are active simultaneously in an audio conference phone, voice signals arrive at different microphones at different times due to the reflection of the sound from walls, ceilings or other surfaces which causes sound distortion. ClearOne's VoIP Conferencing Phone resolves this problem.ClearOne's First Microphone Priority technology minimizes this distortion by using an intelligent voice detection method to activate only one microphone at a time based on its proximity to the person speaking.



• ClearEffect™ - The vast majority of conference calls are conducted using narrow-band telephony signals, which eliminate the high and low tones from participant's voices. This causes listener fatigue due to participants straining to hear what is being said. ClearEffect creates natural, full-sounding audio by simulating the high and low tones that were eliminated by the narrow-band signal. The result is similar to moving from a clock radio to a full-room entertainment system.

Source :- http://www.clearone.com

VoIP Speaker Phone

Making all the long distance phone calls you want for one low price! Many broadband Internet providers are touting new services to make long distance bills a thing of the past. Companies are foregoing traditional telephony service and opting to go with newer services that use network technologies to provide telephone service. How are these things possible? Yes we can say it is possible by using ClearOne VoIP speaker phone.

Let us first we discuss what is VoIP and how it is works.

Voice Over Internet Protocol (VoIP) is a new technology that uses broadband Internet and/or network lines to transmit real-time voice information. This technology has the potential for completely changing the way phone calls are made and making phone companies a thing of the past. It is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line.Some VoIP services may only allow you to call other people using the same service, but others may allow you to call anyone who has a telephone number - including local, long distance, mobile, and international numbers. It is simply the transmission of voice traffic over IP-based networks.

When you make phone calls on the Internet, many things must be happen.On the sending side, analog voice signals are-

• digitized.


• compressed.


• divided into packets.


• transmitted over network lines.

On the receiving end, the signals are-

• recombined


• uncompressed


• & converted back into audio

Equipment needed in VoIP

• broadband (high speed Internet) connection - It could be through a cable modem, or high speed services such as DSL or a local area network.


• computer, adaptor, or specialized phone is required.

The major difference between these voice packets and regular data packets is that for VoIP to be effective, the signals must be delivered in a timely, reliable manner.VoIP can be relatively inexpensive to implement, although costs rise as the complexity of the system increases.

VoIP Telephones There are three methods of connecting to a VoIP network

• Using a VoIP telephone


• Using normal telephone with a VoIp adapter


• Using a computer with speaker and a microphone.

There are currently several problems with this technology like -

• If the computer or network lines fail, then telephone service is interrupted.


• The "up" time of these systems is still significantly less than with traditional phone systems


• that tracking the origin of a call is difficult because the signals are transmitted over the Internet.


• the quality of VoIP service is lower than that of a traditional phone system.

ClearOne’sPersonal Conferencing speaker phone products provide unmatched full-duplex audio clarity and connect to a wide variety of devices for conferencing whenever and wherever you need it.

Note:- The Information based above is collected from various resources

Clearone's Zee Hakimoglu Named North American Audio Conferencing CEO of the Year by Frost & Sullivan

SALT LAKE CITY--(BUSINESS WIRE)----ClearOne (OTC: CLRO.OB) , the global provider of audio conferencing products, today announced that Zee Hakimoglu, president and CEO, received the prestigious 2007 North American Audio Conferencing CEO of the Year Award at Frost & Sullivan's annual Best Practices awards banquet on Wednesday, January 24th.

Each year, Frost & Sullivan recognizes the CEO or executive who has demonstrated leadership within his or her industry. Gains in market share, decisions that improve earnings and grow the company, and leadership that affect observable changes in the industry, are common CEO performance measurement criterion and are important metrics Frost & Sullivan utilizes in its CEO of the Year Award selection process.

In choosing its CEO of the Year, Frost & Sullivan's analyst team considers market share, market growth, market penetration, profit margins, stock price, and overall industry impact in relation to CEO corporate organizational and strategic business actions.

Hakimoglu, who has been with ClearOne since 2004, is credited with bringing the company current on its financial reporting, moving the company off the pink sheets market to the OTC market, stabilizing the product and marketing plans, and refocusing ClearOne on its core business.

Frost & Sullivan also noted that Hakimoglu has ensured that ClearOne is not just relevant, but a leader in the audio conferencing systems space, with a series of audio conferencing products that fit the price and feature needs of most customers.

"It is an honor to be recognized by Frost & Sullivan, one of the world's leading analyst firms," said Zee Hakimoglu, ClearOne's president and CEO. "This award is especially meaningful as it acknowledges the obstacles we have overcome in the past few years while also commending our strategic direction for the future. I am proud to say that our hard work has prepared us for the future. One never achieves success alone, so this award equally belongs to the entire ClearOne team."

ABOUT CLEARONE

ClearOne is a communications solutions company that develops and sells audio conferencing systems and related products for audio, video and web conferencing applications. The reliability, flexibility and performance of ClearOne's comprehensive solutions create a natural communications environment that saves organizations time and money by enabling more effective and efficient communication.

For information, log on to www.clearone.com

About Best Practices

Frost & Sullivan Best Practices Awards recognize companies in a variety of regional and global markets for demonstrating outstanding achievement and superior performance in areas such as leadership, technological innovation, customer service, and strategic product development. Industry analysts compare market participants and measure performance through in-depth interviews, analysis, and extensive secondary research in order to identify best practices in the industry.

About Frost & Sullivan

Frost & Sullivan has been partnering with clients to support the development of innovative strategies for more than 40 years. The company's industry expertise integrates growth consulting, growth partnership services, and corporate management training to identify and develop opportunities.
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