Voice Paging Quality in Warehouse Distribution Centers
August 29, 2024
Distribution centers and warehouses that provide voice paging and background music face significant challenges in optimizing sound quality. These buildings typically have large open spaces with high ceilings, concrete walls and floors. These create reflective surfaces, which cause sound to bounce around. This phenomenon, known as reverberation, degrades overall voice paging quality. The more reflections and reverberations there are, the more likely it is that a voice page will become less intelligible.
How can you overcome these audio challenges in a warehouse enviornment?
To optimize warehouse acoustics, it is crucial to understand how sound disperses from speakers, reflects off surfaces, and what type of speakers can overcome these challenges.
Horns and cone-type speakers are the most installed speakers for warehouses. Horns are powerful and suited for noisy environments, but they are not designed for music reproduction. Playing music through a horn will sound “tinny” and in some cases cause premature failure. Horns produce sound via a moving coil and diaphragm within their structure. The sound then travels through the horn and is emitted out through the bell. The sound is usually highly amplified to reach long distances and it reflects off the many surfaces it hits. To cover large sound areas, multiple horns must be used and must be spaced a certain distance apart.
Another common and popular style of speaker is the cone-type speaker. These speakers are found in large gymnasiums and warehouses in low to medium ambient noise environments. Cone-type speakers can emit sound in large open spaces and play quality background music but have their limitations. A cone-type speaker is not as efficient (loud) as a horn so to cover the same amount of area, even more speakers would have to be used than horns to provide the necessary sound coverage. This results in many more points in the warehouse where sound is dispersed, and this results in a greater amount of reverberation. Horns and speakers are generally installed facing in one direction and disperse sound in that same direction. The direction/area that each speaker or horn effectively covers can be described as a dispersion angle. Dispersion angles of traditional horns and speakers at low frequencies are fairly wide but as frequencies increase the dispersion angle narrows. The frequencies that provide voice intelligibility are in these higher frequencies. Still, a properly designed and balanced horn or speaker system can provide an intelligible voice paging system in warehouses. But, there is a better solution.
What audio solutions exist that is not a horn or cone-type that will have less reverberation in a warehouse environment?
An alternative solution worth considering is the Sound360° warehouse speaker from Valcom. The flat panel style acts as if it has many tiny speakers in the panel and disperses sound in 360 degrees. The Sound360° speaker replaces up to 3 to 4 horns or speakers in a warehouse design. This results in less points of sound dispersion and therefore results in less reflection points and less reverberation. The graph to the right shows the narrower range of sound dispersed in a horn or cone speakers and the narrow range of intelligibility compared to the Sound360°. The eloquent design disperses sound in a wider area and provides a greater range of intelligibility than a cone or horn type speaker. The cleaner dispersion of sound results in less trouble with blended areas than you have with horn or cone-style speakers. The Sound360° speaker from Valcom provides better quality sound in a warehouse than a traditional horn and can replace up to three to four horns as illustrated by the graphic on the right.
The Sound360° Flat Panel Speaker facilitates voice paging and high-quality background music, making it suitable for distribution warehouses, light manufacturing centers, and large retail stores. The Sound360° Flat Panel Speaker come in IP, self-amplified and 25/70 Volt. Other innovative products launched by Valcom to improve workplace efficiency and day-to-day communication include the Building Communication Panel. The Building Communication Panel helps companies streamline daily communications and allows for quick activation of emergency alerts to multiple departments and channels.
