To Reduce Hospital Noise, Researchers Create Alarms That Whistle and Sing


In 2012, Yoko Sen was in an emergency room, tethered to a machine bleating relentlessly in her ear.

She was “freaked out,” she stated, and felt helpless.

When a nurse returned to the room, Ms. Sen requested if it was O.Okay. the machine was screaming.

“Yeah, this thing just beeps,” she recalled the nurse saying.

Ms. Sen, an digital musician, was surprised. How might one thing “so loud and so jarring” be thought-about regular?

“The fear of not knowing amplified the feeling of anxiety,” she stated.

And how, she questioned, might clinicians stand up to the clangor?

“You don’t need to have alarms scream at you,” said Judy Edworthy, a professor of applied psychology at the University of Plymouth, in Britain.

But, she said, “people take a lot of convincing” that alarms don’t need to be so startling.

For device manufacturers, sound is often an afterthought in the design, Dr. Edworthy said, and they are worried about being sued if a machine had failed to cry out.

So, without an enforceable, universal standard, alarms have run riot.

They are also using sounds based on an outdated set of international safety standards, which have, paradoxically, perpetuated the din.

Dr. Edworthy, who has been called the godmother of alarms, is leading a passionate group of specialists, including Ms. Sen, who now works with device manufacturers and hospitals to incorporate the needs of patients and clinicians, and Elif Ozcan, who leads the Critical Alarms Lab in the Netherlands.

Together, this group is developing tones that replace the anodyne blare of the current alarms with signals that mimic electronic dance music and or a heartbeat.

They are working to make alarms quieter, combining audible alarms with visual cues like interactive screens that look like paintings, and working to develop a new standard that is likely to go into effect early next year.

And the sound for mechanical blood flow and oxygenation was modeled after the “yo-EE-oh” of the Witch’s guards from “The Wizard of Oz,” a musical tritone known as the devil’s interval.

The sound for drug infusions was intended to mimic drops falling and “splashing” up, represented by a jazz chord called an inverted ninth.

But each ditty has the same rhythm and the same number of pulses, making them difficult to tell apart and difficult to learn. And they were never tested. Dr. Block later issued a public apology on behalf of the committee for approving the sounds.

“We did the best we could,” he said recently, “but the sounds were basically terrible.”

Now, Dr. Edworthy is spearheading the creation of a “revolutionary” set of tones, Dr. Block said.

Audio technology has changed drastically since the eight tones were created, said Dr. Edworthy, who has created sonic alerts for nuclear plants and train systems.

“It’s now possible to produce pretty much any sound you want from a medical device,” she said. “Of course, that’s a new set of problems.”

The proposed sounds, called auditory icons, are representative of their functions, like the crumpling paper sound that your computer makes when you throw files in the trash. In this case, the sounds represent critical organ functions and imitate the lub-dub sound of a heartbeat, or a rattling pill bottle for a drug infusion, or a whistling teakettle for temperature.



Source link Nytimes.com

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