Bad acoustics are a by-product of busy open-plan offices that continue to thrive. Is it time for a change?
Fine-tuning the open-plan office
Offices are inherently loud, open plan offices even more so. Loud conversations, phones ringing, keyboards clicking... Energy becomes dissonance and poor acoustics end up hurting wellbeing and productivity in the workplace.
By its virtue, sound reverberates with every surface. Picture an office with a polished concrete floor, an exposed concrete structure and a glazed facade - every ringtone and phone conversation bounce from one hard surface to the next until finally, it is absorbed by nothing other than the ears of the workers. Before long, employees lose focus and the workplace turns into chaos buzzing with distractions.
1. Sound absorption
Using sound absorbing materials can provide some acoustic relief and restore much-needed levels of peace and quiet in virtually every area of your office. Think reception areas, conference rooms, breakout spaces and open plan offices with activities ranging from phone intensive to focus work.
Where can you use sound absorption?
To absorb a significant amount of noise in your office, you can use high performing acoustical ceiling tile with an NRC rating (Noise Reduction Coefficient) of .75 or higher. The NRC rating indicates how absorptive a material is. Ratings of .50 (50 percent) are typical of an average acoustical ceiling tile while some of the best acoustical panels boast a rating of 1 (100 percent.)
Although not a favourite in terms of aesthetics, acoustical ceiling tiles are easy to drop into your standard ceiling grid, thus making for a quick fix to bad acoustics at the office.
Sound absorbing panels
If an acoustical ceiling is not the right design approach for your office, you might want to consider baffles or decorative acoustic panels, both available in ceiling and wall-mounted versions and in every shape or form imaginable.
How do you choose between baffles and ceiling panels? The main difference lies in the mounting. While panels are fixed horizontally, baffles are mounted vertically – the former allows for optimal sound absorption while the latter is perfect for busy ceilings or in offices with skylights that wouldn't be blocked.
Acoustic panels come in varying forms and sizes, from large discs to leaf-shaped panels and by placing them in strategic, loud places in the office, the noise levels can be significantly reduced.
Cork board tiles
This is your ticket to blissful acoustics with added aesthetic value. Expanded cork wall sheets offer a perfect vibroisolation, thermal insulation and acoustic isolation. Cork panels can be left to shine or finished with paint, lacquer or wood stain.
Use warmly textured cork panels to lend character to your office and, depending on location, transform parts of it into a decorative yet functional tackboard for ideas to be pinned down.
Acoustic office furniture
Sound absorbing furniture is yet another creative way to manage poor acoustics in the workplace. From high-back acoustic sofas and privacy lamp shades to sound absorbing dividers and work bays, there is a plethora of innovative acoustic furniture designs on the market.
Perhaps best suited to intimate meeting spaces and waiting areas that are part of open plan office, wrap-around furniture offers a cocoon of silence that fosters privacy.
2. Sound masking
Interestingly, sound masking is the physical opposite of sound absorption – instead of removing sound, it adds it. It isn't about making the space noisier though, but rather about distracting the ear from other noise.
Small speakers placed in the ceiling or mounted to posts emit pre-programmed, frequency-appropriate white noise designed to mask conversations. The soft, uniform background noise elevates the ambient noise level so that conversations at a distance becomes unintelligible.
This technique is ideal in offices where quiet is too quiet, where the sound of a pen dropping or a bag of crisps being cracked open echoes throughout the space, making for an uncomfortably eerie environment.
A well-tuned sound masking system will deliver uniform sound at the right volume and within the right spectrum, halving the radius of distraction from an average of 13 meters to 6.
Cost-effective and easy to install, a sound masking system will not affect the aesthetics of your office; it will however highly improve its acoustics.
Which acoustic solution is best for me?
Many variables come into play when deciding which solution is best for your office but the likely answer will often be: a little bit of both. Most open plan offices often sway between loud and dead quiet several times a day. In such instances, absorption would help subdue the loudness while masking would ensure the right levels of privacy between desks with the help of a quiet hum.
Fine-tuning your office may be hard but it is not impossible. With a little help from a professional, your office can quickly become an acoustic feast for all five senses.