Reducing Background Noise in Institutional Voice Trading

Reducing Background Noise in Institutional Voice Trading

Voice trading has been an instrumental part of the institutional trading ecosystem for decades. Even with the advent of electronic trading, voice trading has continued to play an important role in daily trading workflows. But voice trading is not done in a box and background noise has always been part of the equation, especially on the noisy trading floors and broker pits of yesteryear. Now, with the shifting dynamics of traders working remotely, voice trading background noise has taken on a new shape and, as a result, so has the technology used to detect it.

How big of a problem does background noise really play in voice trading? It starts with the quality of the microphones traders use. Whether at home, in an office or on a boisterous trading floor, traders alone cannot control what their microphones can or cannot pick-up.

Historically, phone turrets required traders to be no more than one inch away from the microphone. Not surprisingly, traders hated having to speak from no more than one inch from their microphone in order for their device to capture a clear enough sound. While leaning into the microphone can get old quickly, most traders also don’t like using headsets. Instead, they use a device of their choosing, many of which have become more portable and less cumbersome.

However, with advancements in innovation and mobility come new challenges – in this case, a new assortment of background noises.

Today, microphones are developed so traders can be as much as a foot away. While these newer microphones allow traders to speak from a less intrusive distance, the “critical distance” – the distance at which background speech and noise can be detected – is also expanded. New microphones are addressing a physical issue for traders but creating a new issue for engineers and even compliance teams by picking up more noise around the room.

At the outset of the COVID-19 pandemic last year, all traders were forced into the confines of their homes, creating an entirely new set of background noise that microphones began to detect. Despite the advancements in trader microphones, the technology was not yet capable of removing noises such as babies crying, lawnmowers, or kitchen appliances like dishwashers.

Even though many traders went home to ostensibly silent homes, these subtle but unfamiliar sounds were being detected by today’s noise detection algorithms. Items like laptops and cell phones are changing the way background noise is detected, while even the somewhat trivial clicks of moving a computer mouse, dangling wires or even the placement of a computer can change the way sounds are picked up in the microphone’s path, creating a nightmare for audio engineers.

With recent advancements in Machine Learning, systems can be trained with a set of good and bad case scenarios and gradually learn through speech and voice detection to the point where non-voice sounds can be completely eliminated. In some cases, even small reflective office reverberation can be reduced, improving intelligibility. Trained Machine Learning models that are employed today are exponentially better than voice trading technology that was available twenty years ago. Computing power today is also more readily available, enabling these capabilities to take place without any noticeable impact to audio.

The microphone is not the sole issue. It’s also who is talking on the other side of the line. While there may be minimal background noise on one side, the person on the other side of the conversation may have a multitude of noises that are being captured by their microphone. When you don’t have a good microphone it’s hard to detect background noises such as chairs moving, tapping keyboards, and paper crumpling.

The goal is to reduce that background noise coming in from as much as twenty feet away. Noise reduction algorithms have been developed and are being incorporated into microphones today with optimal accuracy at filtering out unnecessary background noise. Prior algorithms would be tricked by various background noises such as pet sounds, appliances, and any other home-produced complex noises.

Source separation allows algorithms to separate speakers in overlapping conversations taking place simultaneously while discerning what background voices can be weeded out.

While directionality is difficult to detect with a single microphone, modern algorithms and microphone enhancements are able to identify speaker directionality with more than one device – the location from which voices are being captured – and are equipped with much better audio quality, ultimately helping to mitigate background noise issues for engineers and compliance personnel.

Many of the world’s largest CSPs and technology vendors have employed teams of data scientists to develop these capabilities, particularly with the increasing intersection of audio and video. AI and Machine Learning will play a significant role in the advancement of these capabilities, as well as more complex areas such as loudness and tonal balancing, reverberation reduction and immersive audio trading desk experiences.

The next step in advancing these algorithms and microphones even further is adjusting the technology specifically to how the trading floors of today look. While many of these algorithms are being developed individually, some of the voice trading problems are typically much less tolerable to end-users and present immediate challenges. A key element will be securing more source data in order to continue innovating and maintain high-quality results as the environment continues to evolve. Firms that are not already looking into these capabilities will indeed be left behind.

To learn more about how Cloud9 can help reduce background noise in institutional voice trading, contact us today.


Andrew Pappas is a Chief Architect at Cloud9 Technologies. He joined Cloud9 in 2014 after spending nearly 17 years at IPC Systems as a Senior Software Engineer. He holds a BE in Electrical Engineering and Biomedical Engineering from Farmingdale State College.

This article was originally published by Financial IT. 

Cloud9, Symphony & Google Cloud to Host Virtual Roundtable on Smart Cloud Deployment & Mission Critical Services

Cloud9, Symphony & Google Cloud to Host Virtual Roundtable on Smart Cloud Deployment & Mission Critical Services

Join us for our next virtual roundtable discussion taking place on Thursday, December 9 @ 10am ET (3pm BST) as panelists from Google Cloud, Symphony and Cloud9 examine the importance behind smart cloud deployment and the mission-critical services that support trading and cloud-based workflows.

This discussion is particularly timely as the industry continues to adjust to hybrid working conditions that have accelerated wider use of the cloud and help drive a greater appetite for more sophisticated data and analytics on and off the trading floor.

We will examine:

  • What the cloud deployment process looks like today and how is it changing as companies continue to adopt a more hybrid working culture that leverages a virtual trading floor
  • How firms should be approaching security in the cloud and what do they need to do now to ensure they’re ready for the start of 2022
  • How the cloud is empowering businesses to scale more seamlessly and the precautions businesses need to take when shifting to a cloud environment
  • The changes that are taking place in the price discovery process and its impact on wider adoption of the cloud
  • The biggest changes expected to take place amidst the growing reliance on cloud deployment, hybrid cloud, and even multi-cloud environments in 2022
Connecting the Community: Symphony Interfirm Workflows featuring Cloud9 and StreetLinx

Connecting the Community: Symphony Interfirm Workflows featuring Cloud9 and StreetLinx

Connecting with the Community: Gary Godshaw, Symphony’s CRO, Michael Lynch, Symphony’s CPO, and Jim Miller, Cloud9’s COO demonstrate the newest interfirm workflow integration with Cloud9 and StreetLinx, live at Symphony Innovate 2021. They are joined on stage by Corry Starr, Strategic Account Manager, Cloud9 and Dana Starr, SVP, Professional Services, Cloud9

Interested in learning more? Contact us today!

[PODCAST] Establishing the New Standard in Institutional Trading Communication

[PODCAST] Establishing the New Standard in Institutional Trading Communication

As the vast selection of collaboration tools available to institutional traders continues to grow, coupled with the accelerated adoption of emerging technologies, many firms are struggling to address the knock-on effect this is having on trader workflows. In the seventh episode of Cloud9’s podcast series examining developments in the voice trading landscape, Cloud9’s Chief Operating Officer Jim Miller and Symphony’s Chief Product Officer Michael Lynch examine how fragmented workflows can be solved by consolidating trading tools with voice capabilities and how Symphony’s recent acquisition of Cloud9 is playing a key part in alleviating challenges.

Becoming the Underlying Voice Trading Engine

Becoming the Underlying Voice Trading Engine

Capital markets have undergone a seismic shift in recent years, particularly with the accelerated adoption of technology and cloud-based solutions over the last 15 months. One thing that has not changed, however, is the importance voice trading continues to play in the institutional landscape. And with the increasing levels of sophistication that are enabling individuals on and off the trading floor to communicate with each other – particularly through more advanced APIs – there is now a greater appetite than ever before for cloud-based trading solutions.

The days of solely relying on traditional trading turrets and private wires are dwindling away. Filling that gap are cloud-based, API-driven trading platforms that are driving innovation, enabling firms to streamline workflows, and empowering access to a virtual trading floor that will very soon become the norm across the industry.

In the last year alone, there has been more adoption of cloud than in the ten years prior combined. The pandemic has been a key driver, although this transition was certainly underway prior to last March. When remote working began last March, every firm had to quickly transition to 100% remote – something that cloud-based trading solutions and APIs already enable. 

Firms are not only more comfortable with data residing in the cloud but they are now more frequently coming to vendors for help. In fact, leadership at major banks and financial institutions is becoming more outspoken about the need for cloud.

Some customers are generating more than 300,000 voice trading recordings each month. Thanks to advanced APIs and natural language processing (NLP) technology, firms are able to capture the audio of these conversations with 99% accuracy. This not only simplifies the regulatory and compliance process but also delivers more actionable insights that elevate performance.

Two things are becoming very clear. The capabilities for firms to efficiently and securely conduct voice trading in the cloud are there. Firms are becoming far more comfortable using the cloud to access a virtual trading floor and with storing data there.

However, with the growing appetite – and the need – for cloud-based voice trading capabilities, therein lies a growing responsibility for the technology vendors to continue pushing the innovation curve and fuel the voice trading engine.


The Vendor Responsibility

Much like other areas of the institutional ecosystem, the approach to voice trading has shifted for many participants. Today, working from anywhere is a basic necessity and having access to data from anywhere is critical. The key driver in developing technology that can support these changes has and will continue to be listening to customers and addressing their concerns. 

API-based platforms are quickly becoming the foundation for the institutional voice trading ecosystem, allowing third parties to access unique voice data and integrate with best-of-breed analytics and surveillance providers. APIs can also ingest rich sources of data that can help analyze and improve the productivity of traders.

About two years ago, remote virtual desktop infrastructure (VDI) began to gain traction and is now enabling more of a hybrid approach for folks who prefer to share time between the trading floors and a remote work environment. Moving forward, support around VDI and ‘work from anywhere’ will become central to everything in institutional trading.

With a greater selection of collaboration tools available and more ways to talk to customers, technology and structural complexities are inevitable. It is up to the vendors to address these hurdles by integrating data with back-office systems and data warehouses.


Becoming the Industry Engine

Voice trading is not a one-size-fits-all. Customers want optionality and the ability to customize workflows. Some have already immersed themselves in the cloud while others still seek a traditional phone turret experience.

With institutional IT teams focusing more on value-add than just on the overall infrastructure, vendors have to provide sufficient management so that IT teams can more easily and seamlessly implement these solutions into their own systems. 

The most challenging part is understanding each customer. There are a variety of trader types and with that comes a variety of different workflows. Vendors that are providing voice trading capabilities need to define each of these workflows and have the APIs to support them.

What is most important is that a cloud-based virtual trading setup looks and feels the same for the users. While firms want options around how and where they can operate, they don’t want their teams needing to adapt to different systems depending on where they are on a particular day.

It is no longer about just providing voice capabilities. The focus now needs to be on providing all the voice trading capabilities customers need in a single, intuitive and interoperable platform that’s secure and accessible from anywhere.

Becoming the voice trading engine for the institutional capital markets will be no small task for any technology provider. But enabling anytime, anywhere access, and delivering the ability to digitize data from any conversation simplifies workflows and provides the actionable insights that firms need in our ever-evolving environment.

To learn more about voice trading capabilities and how to navigate the challenges you may be facing in our current environment, please attend our next virtual roundtable that will be co-hosted with EY on Thursday, July 22 at 10am ET. The event will focus on the importance of voice trading data. More information to come but you can secure your spot by emailing

For more information on Cloud9’s voice trading and cloud solutions, please contact us at 


[VIDEO] FINTECH FOCUS TV: David Midgett, CTO at Cloud9 Technologies

[VIDEO] FINTECH FOCUS TV: David Midgett, CTO at Cloud9 Technologies

Last year, our CAO, Brian Hunt joined Fintech Focus TV, where he examined voice trading during the remote working transition. In a recent Fintech Focus TV episode, our CTO, David Midgett offers an exclusive look at what Cloud9 has been up to since then. From exciting technological innovation and exceptional company growth to how voice trading and data capture technology have changed and why the cloud is no longer a “nice to have” but a “need to have” element of an institution’s infrastructure.