Noise analysis in professional office chairs.

Area of Science:

• Ergonomics and Occupational Health
• Acoustics and Materials Science

Background:

• Workplace chair noise can indicate structural risks and negatively impact employee productivity and stress levels.
• Current Brazilian ergonomics standards do not address chair noise as a factor in workplace design or product acquisition.
• Understanding noise generation is crucial for improving workplace environments and employee well-being.

Purpose of the Study:

• To analyze the incremental variation of noise in professional chairs to identify its origin, timing, and causative agents.
• To determine how different materials and adjustment mechanisms interact to produce sound.
• To provide data for improving chair design, material selection, and production processes.

Main Methods:

• Noise measurement in an acoustically isolated room using directional microphones.
• Recording and analysis of sound characteristics from various chair materials and adjustment mechanisms.
• Investigating noise emission during the period of use to pinpoint origins.

Main Results:

• Identification of specific noise origins and causative agents related to chair usage.
• Characterization of sound produced by different materials and mechanical interactions within chairs.
• Data enabling the assessment of chair quality and potential structural issues.

Conclusions:

• Chair noise analysis can reveal structural weaknesses and identify key factors affecting workplace productivity and employee stress.
• Recommendations can guide users, managers, and procurement in selecting better quality chairs and materials.
• This research highlights a gap in current ergonomics standards regarding chair noise evaluation.