Design of the environment is instrumental in aiding recovery which is why noise was central to our high performance macerator. We accurately measured it so we could understand how to improve our design but then went a step further to introduce night mode.

Quieter by design

At only 54dB in night mode (that’s 6dB quieter that the average macerator) Quattro is twice as quiet as other macerators.

It is pre-set for 11pm to 4am – the bright blue button indicates it’s on. Conveniently users can turn night mode on or off by simply pressing and holding the button.

Together with improvements to the blades, anti-resonance pads and improved water management, it makes Quattro the quietest macerator on the market.

Photo of a quiet hospital ward at night
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How do I understand the decibel rating (dB) on the Quattro macerator?

Facilities managers are becoming increasingly under pressure from ward staff about installing machines that are operated in wards.  Whilst it may be convenient in disposing of human waste at the point of care, understandably they are concerned of the effect noise will have on their patients recovery.

This is why Haigh has concentrated on improving its operating noise level.   To help explain, here is how a decibel scale works.

The smallest audible sound (near total silence) is 0 db. A sound 10 times more powerful is 10 db, a sound 100 times more powerful than near total silence is 20 db and a sound 1,000 times more powerful than near total silence is 30 db.  So to put decibels into context a whisper is 20dB and normal conversation is 60dB.

A typical pulp macerator operates at 60 – 65dB – so the level of normal conversation.  We worked with noise analysis experts to understand where the noise was coming from and how it was transmitted in our machines.  Our design engineers then used several strategies to reduce the sound in the machine as well as launching the night mode function.

Night mode is an option to reduce the sound of your machine dramatically.  Because of the way sound measurement works a small increase in decibels represents a large increase in intensity – so a 10dB decrease actually equates to a sound that is twice as quiet.  So when Quattro is on night mode at 54dB it is actually more than twice as quiet as a macerator operating at 65dB.

In a ward where noise from the macerator is an issue, night mode will make it more likely for ward staff to use throughout the night.  I’m not aware of any other macerators that are as quiet as this machine on night mode.

St. James’s NHS University Hospital, Leeds