Smartphone applications for measuring noise in the intensive care unit: A feasibility study

Lee, Pyoung Jik; Hampton, Thomas

doi:10.1016/j.jcrc.2023.154435

Cited by 1 publication

(1 citation statement)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dB(A) measurements were compared to true noise levels obtained through a calibrated sound level meter. The investigation in [87] revealed that app-based measurements effectively captured average noise levels, exhibiting a variance of ±2 dB when compared to measurements obtained using the gold standard sound level meter. dB(A) represents the weighted average of the sound pressure in dB, which is tailored to match the human ear's frequency response.…”

Section: Understanding Servo Motor Audio Noise and Overheatingmentioning

confidence: 99%

NOHAS: A Novel Orthotic Hand Actuated by Servo Motors and Mobile App for Stroke Rehabilitation

Selvaraj Mercyshalinie,

Ghadge,

Ifejika

et al. 2023

Robotics

View full text Add to dashboard Cite

The rehabilitation process after the onset of a stroke primarily deals with assisting in regaining mobility, communication skills, swallowing function, and activities of daily living (ADLs). This entirely depends on the specific regions of the brain that have been affected by the stroke. Patients can learn how to utilize adaptive equipment, regain movement, and reduce muscle spasticity through certain repetitive exercises and therapeutic interventions. These exercises can be performed by wearing soft robotic gloves on the impaired extremity. For post-stroke rehabilitation, we have designed and characterized an interactive hand orthosis with tendon-driven finger actuation mechanisms actuated by servo motors, which consists of a fabric glove and force-sensitive resistors (FSRs) at the tip. The robotic device moves the user’s hand when operated by mobile phone to replicate normal gripping behavior. In this paper, the characterization of finger movements in response to step input commands from a mobile app was carried out for each finger at the proximal interphalangeal (PIP), distal interphalangeal (DIP), and metacarpophalangeal (MCP) joints. In general, servo motor-based hand orthoses are energy-efficient; however, they generate noise during actuation. Here, we quantified the noise generated by servo motor actuation for each finger as well as when a group of fingers is simultaneously activated. To test ADL ability, we evaluated the device’s effectiveness in holding different objects from the Action Research Arm Test (ARAT) kit. Our device, novel hand orthosis actuated by servo motors (NOHAS), was tested on ten healthy human subjects and showed an average of 90% success rate in grasping tasks. Our orthotic hand shows promise for aiding post-stroke subjects recover because of its simplicity of use, lightweight construction, and carefully designed components.

show abstract

Section: Understanding Servo Motor Audio Noise and Overheatingmentioning

confidence: 99%