The Benefits of Commercial Office Sound Masking Systems

In open office environments, noise can be a significant barrier to productivity. Sound masking systems are rapidly emerging as the go-to solution for businesses looking to create more focused, private, and comfortable workplaces. Sound masking is the strategic introduction of continuous, engineered background sound-often resembling gentle airflow-to reduce the perceived intelligibility of human speech.

Open offices are popular for fostering collaboration and creativity. However, they come with a significant downside: noise distractions. The lack of acoustic barriers often disrupts employees’ focus, reducing productivity. Transform your open office into a productivity powerhouse with sound masking solutions. For expert guidance and customized systems.

Creating an efficient and comfortable workspace is essential for productivity in today's business world. Open- and closed-plan offices increasingly face noise-related challenges-whether it's maintaining privacy or reducing distractions. Sound masking offers a sophisticated solution to these issues, contributing to an environment that promotes focus, confidentiality, and employee well-being.

Implemented properly, a sound masking system improves speech privacy, minimizes noise distractions, and supports better workplace acoustics. Sound masking solutions have been successfully deployed in commercial environments since the 1960s.How Sound Masking Works and Improves Office Acoustics

What is Sound Masking?

Sound masking is the practice of adding a controlled, ambient background sound to an environment. Sound masking is engineered to blend seamlessly with existing ambient noise. Unlike noise-cancellation, which eliminates noise, sound masking makes disruptive sounds less noticeable. It targets specific frequencies-usually between 2,000 and 8,000 Hz-to obscure distracting conversations without being disruptive itself.

Unlike traditional white noise, which can be harsh and hissy, the noise used for sound masking is carefully tuned. Sound masking systems generate a spectrum of sound that is carefully calibrated to the environment’s unique noise profile.

Unlike soundproofing, which blocks and absorbs sound physically, sound masking covers noise by adding background sound that reduces the perception of conversations and other noise. It is important to note that the sound used for masking is precisely engineered and, while often mislabeled as such, is not white noise. White noise, which contains all audible frequencies at equal levels, is often perceived as harsh and is not used in modern masking systems.

How Does Sound Masking Work?

Sound masking systems introduce a background sound tuned to conform to a specified spectrum. Usually, the spectrum for a sound masking system ranges from 100 to 10,000Hz. With increasing frequency, the level decreases. The ambient noise is subtle and designed to blend into the background.

As such, it ensures that the noise is subtle and comfortable to the human ear. The sound is gentle and unobtrusive and, when done correctly, integrates well into the environment.

Key Characteristics of Sound Masking:

Frequencies and Levels: The spectrum ranges from 100 Hz to 10,000 Hz with an overall level typically from 40 to 48 decibels.
Site Specific: A sound masking system should be specially designed for the characteristics of your facility.

Key Technical Elements

Key technical elements include frequency calibration, volume balancing, and zoning and integration. Frequency calibration ensures that the system emits sound in a specific frequency band tailored to effectively cover unwanted background chatter while still preserving the clarity of essential sounds.

Direct Field Sound Masking Systems

Direct field sound masking systems are typically installed like traditional ceiling speakers that point downward into the workspace. In these systems, the sound masking noise is delivered directly into the room. Because they are positioned in the immediate vicinity of the listeners, direct field systems require careful volume balancing.

They are designed so that the masking sound slightly exceeds the level of ambient noise, ensuring that no single noise source-such as a conversation-dominates the acoustic environment. However, the direct nature of these speakers can sometimes create hotspots, making it necessary to use multiple channels or emitters to achieve a uniformly distributed sound field.

Indirect Field Sound Masking Systems

Indirect field sound masking systems are installed above the ceiling grid, where the speakers direct sound upward into the plenum space. The sound then reflects off the ceiling and disperses evenly throughout the room below. This method benefits from a more uniform sound distribution with fewer speakers required, and it typically produces a more consistent acoustic environment across larger areas.

The Core Benefits of Sound Masking in Commercial Spaces

Enhanced Speech Privacy

One of the significant challenges in closed-plan offices is achieving the necessary level of speech privacy. Conversations can easily be overheard between rooms or outside them, in a workspace or hallway. Sound masking reduces speech intelligibility so that people outside the room cannot understand what is being said, thus keeping sensitive information secure. This is beneficial in all industries.

Reduced Distractions in Open-Plan Offices

One of the most common complaints in open-plan offices is noise distraction from the sounds of conversations, ringing phones, and other ambient noises that both irritate and disrupt focus. This can be lessened by sound masking, such that employees may focus without being constantly interrupted.

By reducing the intelligibility of nearby conversations, sound masking promotes a quieter, more focused environment and, hence, greater productivity. Noise at work has been proven to decrease cognitive performance and increase stress levels; therefore, reducing excessive noise helps improve employee performance and general well-being.

Improved Acoustic Comfort for Employees

By providing a comfortable, stable background sound level, reducing disruptions, and increasing privacy, masking systems enhance acoustic comfort. With the introduction of a constant, unobtrusive background sound, a sound masking system reduces the cognitive effort required to focus in the presence of unpredictable noises. This creates a more pleasant working environment, allows workers to concentrate better, and reduces stress throughout their workday.

Improved Meeting Room Privacy

Meeting rooms are often used to discuss sensitive or confidential information. Speech privacy is essential. Sound masking systems help ensure delicate discussions are not overheard. While all organizations have a need to protect confidential information, it is particularly essential in industries such as law, finance, and in HR settings, where safeguarding private information is required, playing a considerable role in retaining the confidence of clients and ensuring regulatory compliance.

Cost-Effective and Scalable Solutions

Sound masking is a cost-effective solution and contributes uniquely to the overall acoustical design of a space. Even in retrofits, installing a sound masking system is minimally disruptive to your workspace. Systems are easily scaled to fit a variety of layouts.

To meet specifications and align with industry testing standards, control zones in open areas should not exceed 92 square meters (1000 square feet) and every closed room should have a dedicated control zone. Whether working in a large open plan, a series of private offices, or a combination thereof, sound masking systems can fit an organization's needs. A system may cover areas as small as 21 m2 (225 ft2) or entire corporate campuses, scaling to businesses ranging from boutique enterprises to global organizations.

Employee Wellness

Other than the benefits of improved concentration and productivity, there are also wellness benefits from sound masking. Noise pollution in the workplace has been associated with higher stress levels, increased fatigue, and cognitive overload. Exposure to noise may contribute to a decline in mental well-being, leading to increased absenteeism and decreased job satisfaction.

A sound masking system helps eliminate these problems by making a room more acoustically balanced. Lowering noise levels reduces stress and improves workers' cognitive function. Employees working in quieter, more comfortable environments are less likely to be overwhelmed, leading to better mental health and engagement.

Application Sound Masking in Different Commercial Spaces

General Office Environments

Open-plan and shared office environments are some of the most challenging to control for noise and privacy. Sound masking improves speech privacy and minimizes noise distractions, allowing improved focus.

Human Resource Departments

These departments deal with private staff matters and must keep information private. Sound masking contributes to an effective overall acoustical design, ensuring speech privacy.

Financial and Legal Sectors

Sound masking systems help protect the confidentiality of discussions with clients in financial institutions and law offices. Masking systems are often used in retail bank branches.

Contact Centers

Call and contact centers manage a high volume of verbal and confidential information. Staff are often surrounded by constant distractions, leading to burnout and errors. Sound masking has been shown to help improve the acoustical performance of these spaces and their occupants.

Sound Masking Safety

Decades of implementation have shown no evidence that sound masking systems cause adverse health effects. Modern systems like Cambridge Qt use pink noise-a balanced background sound centered around the frequency range of human speech-to effectively lower speech intelligibility.

Sound masking typically operates at a measured sound pressure level (SPL) of no more than 48 decibels A-weighted (dBA) in an open office. This sound masking level is significantly lower and set at 40 to 42 dBA in private offices.

A-weighting is a filter process used to better represent sound levels based on how humans perceive sound and is the standard for the measure of environmental noise levels. The Occupational Safety and Health Administration (OSHA) regulates safe occupational noise exposure levels in dBA SPL over time as published in Title 29 of the Code of Federal Regulations Part 1910.95.

The decibel (dB) is an expression of a logarithmic relationship; therefore, 90 dBA represents an acoustic pressure exposure more than 125 times more powerful than the 48 dBA level of typical sound masking in an open office space. It is worth noting that sound masking solutions from Biamp are not capable of producing sound levels even approaching OSHA limits.

The speakers and amplifiers used in sound masking solutions are physically incapable of reaching harmful levels. Their purpose is to subtly enhance the environment, not to overwhelm it. Like all other professional audiovisual technologies, sound masking requires installation and tuning by a properly trained system integrator.

Choosing the Right Sound Masking System for Your Business

When selecting a sound masking system, choosing a solution that will consistently deliver the correct sound is essential. Performance differences between systems are substantial and customer benefits diminish quickly with inconsistent masking levels. The key factors to consider include:

Control Performance: To achieve the correct masking sound correctly in all areas throughout the property, the system must have small localized control zones.
Tuning: The installation of the masking hardware is just the beginning. To be effective, a sound masking system must be accurately tuned and results verified using standardized test methods and professional-grade analyzers.
Reporting: Measured results showing compliance with the target masking levels across the facility should be provided, based on testing conducted to industry standards.
Customization: Systems must be designed to meet particular needs for your facility.

Sound Masking System Vendors

Here are some vendors that provide sound masking systems:

Biamp Cambridge uses direct field sound masking solutions.
AtlasIED specializes in indirect field sound masking systems.
Lencore offers a versatile range of sound masking solutions that can be deployed as either direct or indirect field systems.
SoftDB provides both direct and indirect field sound masking solutions, with an emphasis on user-friendly controls and energy-efficient designs.