1. Recommended sound levels

For indoor bedrooms at night, WHO lists 30 dB LAeq over 8 hours and 45 dB LAFmax for individual events. The average and maximum describe different aspects of sound and must be assessed separately. [1, 2]

2. Your reading in context

A low average can still contain disruptive events. A short quiet sample does not describe a whole night, and a peak from an uncalibrated microphone is not a measured LAFmax. The outdoor annual night-noise reference is not an indoor bedroom target.

3. How to measure this environment

Place an appropriate meter near the sleeping position, away from handling noise. Record an overnight LAeq and, separately, event LAFmax when assessing both WHO indicators. Keep window and door conditions representative of the way you sleep. For measurement metrics and calibration background, see source [3]. Its app specifications do not validate this browser.

4. Ways to reduce noise

These are practical steps to try, not a prediction of a particular decibel reduction. Recheck the same position and conditions after each change.

• Move avoidable notifications and noisy equipment away from the sleeping area.
• Identify repeated night-time events as well as steady background noise.
• Compare a repeat night under similar conditions after addressing the main source.

5. Sources & evidence

The references are grouped by their purpose below: room guidance, measurement methods, listening context and loud-sound precautions. Additional reading expands the context; it does not change the room reference or establish a personalised exposure limit.

1. WHO — Guidelines for community noise (1999), Table 4.1 ↗Environment referenceTable 4.1, printed page 47 (PDF page 67); relevant dwelling / bedroom row · 1999

   Indoor dwelling guideline: 35 dB LAeq over 16 hours, daytime/evening. Bedroom night guidance: 30 dB LAeq over 8 hours and 45 dB LAFmax. These are environment-specific guidance values, not a short-test pass/fail rule.

2. WHO Europe — Noise — indoor bedroom guidance ↗Environment context / practical controlsHow loud is too loud? · 2011

   Indoor bedroom night reference below 30 dB(A). Its separate 40 dB Lnight value is outdoors and annual; it is not used by this tool.

3. CDC / NIOSH — Sound Level Meter App — measurement and calibration ↗Measurement methodsTechnical specifications / Frequently asked questions · 2024

   Explains A, C and Z weighting, LAeq and other metrics, and calibration of validated equipment. Its accuracy claims apply to the NIOSH iOS app and specified hardware, not to this browser tool.

4. NIH / NIDCD — Noise-induced hearing loss — level, distance and duration ↗Hearing contextWhat sounds cause noise-induced hearing loss? · Reviewed 2026

   Describes how level, distance and duration influence hearing risk, with common sound examples. It does not set a bedroom, living-room or office comfort target.

5. WHO — Safe listening — sound exposure and listening habits ↗Listening contextHow can I protect my ears? / Sound intensity and listening duration · 2026

   Provides general listening and volume-management advice. Its sound examples and listening-duration information are not used as room-specific comfort thresholds.

6. NIH / NIDCD — Hearing protectors — reducing exposure to loud sound ↗Loud-sound precautionsWhat are hearing protectors? / When should you wear hearing protectors? · Reviewed 2026

   Supports turning down sound, moving away, and using appropriate protection when loud exposure cannot be avoided. Covering the ears is a temporary response to unexpected loud sound, not a substitute for appropriate protection.

Evidence reviewed 2026-10-28. Room references are guidance for the stated conditions, not a universal “healthy dB” cutoff or legal assessment. Practical check steps are Divoom editorial suggestions.

1. Recommended sound levels

SafeWork SA advises keeping office noise below 50 dB(A) for work requiring high concentration or effortless conversation. It explicitly distinguishes this guidance from occupational exposure limits. It does not specify a fixed averaging period for this office value. [1]

2. Your reading in context

This profile is for concentrated work and easy conversation. A value such as 60 dBA is numerically 10 dB above the reference, but the number alone does not diagnose harm or determine legal compliance. Speech and interruptions can matter even at lower levels. [1, 2]

3. How to measure this environment

Measure at your normal working position during a representative task, with usual ventilation and equipment running. Note calls, conversations and printers. Use a suitable A-weighted meter for an absolute reading; use this browser to compare relative changes if no meter is available. For measurement metrics and calibration background, see source [3]. Its app specifications do not validate this browser.

4. Ways to reduce noise

These are practical steps to try, not a prediction of a particular decibel reduction. Recheck the same position and conditions after each change.

• Move printers or other noisy equipment away from the main work area.
• Arrange quieter spaces for concentration and separate conversation areas where practical.
• Consider sound-absorbing finishes and maintain rattling or noisy equipment. [2]

5. Sources & evidence

The references are grouped by their purpose below: room guidance, measurement methods, listening context and loud-sound precautions. Additional reading expands the context; it does not change the room reference or establish a personalised exposure limit.

1. SafeWork SA — Workplace exposure standards — office concentration ↗Environment referenceOffice workplace settings · Reviewed 2026

   Ideally below 50 dB(A) for work requiring high concentration or effortless conversation. This is office comfort guidance, not an occupational hearing-exposure limit.

2. OHCOW — Office ergonomics — additional considerations ↗Environment context / practical controlsNoise / Noise reduction · Reviewed 2026

   Office noise can disrupt communication and concentration. Suggested controls include isolating noisy equipment and sound-absorbing finishes.

3. CDC / NIOSH — Sound Level Meter App — measurement and calibration ↗Measurement methodsTechnical specifications / Frequently asked questions · 2024

   Explains A, C and Z weighting, LAeq and other metrics, and calibration of validated equipment. Its accuracy claims apply to the NIOSH iOS app and specified hardware, not to this browser tool.

4. NIH / NIDCD — Noise-induced hearing loss — level, distance and duration ↗Hearing contextWhat sounds cause noise-induced hearing loss? · Reviewed 2026

   Describes how level, distance and duration influence hearing risk, with common sound examples. It does not set a bedroom, living-room or office comfort target.

5. WHO — Safe listening — sound exposure and listening habits ↗Listening contextHow can I protect my ears? / Sound intensity and listening duration · 2026

   Provides general listening and volume-management advice. Its sound examples and listening-duration information are not used as room-specific comfort thresholds.

6. NIH / NIDCD — Hearing protectors — reducing exposure to loud sound ↗Loud-sound precautionsWhat are hearing protectors? / When should you wear hearing protectors? · Reviewed 2026

   Supports turning down sound, moving away, and using appropriate protection when loud exposure cannot be avoided. Covering the ears is a temporary response to unexpected loud sound, not a substitute for appropriate protection.

Evidence reviewed 2026-10-28. Room references are guidance for the stated conditions, not a universal “healthy dB” cutoff or legal assessment. Practical check steps are Divoom editorial suggestions.

1. Recommended sound levels

WHO gives 35 dB LAeq over 16 hours for indoor dwellings during daytime and evening, addressing speech and annoyance. This describes a quiet indoor environment; it is not a volume limit for every conversation or TV programme. [1]

2. Your reading in context

A conversation or television can raise a short reading without representing the day-long background. Compare like periods and note which sounds were active. A short sample cannot establish whether the 16-hour guidance is met.

3. How to measure this environment

For a room-background check, pause TV and music, keep the microphone still near your usual listening position and avoid talking beside it. For a direct guideline comparison, use an A-weighted integrating meter and the stated averaging period. Record whether doors and windows were open. For measurement metrics and calibration background, see source [2]. Its app specifications do not validate this browser.

4. Ways to reduce noise

These are practical steps to try, not a prediction of a particular decibel reduction. Recheck the same position and conditions after each change.

• Pause avoidable TV or music when you want a quiet room.
• Compare the same position before and after closing a door or window, while maintaining suitable ventilation.
• Address the dominant source first; repeat the check under similar conditions.

5. Sources & evidence

The references are grouped by their purpose below: room guidance, measurement methods, listening context and loud-sound precautions. Additional reading expands the context; it does not change the room reference or establish a personalised exposure limit.

1. WHO — Guidelines for community noise (1999), Table 4.1 ↗Environment referenceTable 4.1, printed page 47 (PDF page 67); relevant dwelling / bedroom row · 1999

   Indoor dwelling guideline: 35 dB LAeq over 16 hours, daytime/evening. Bedroom night guidance: 30 dB LAeq over 8 hours and 45 dB LAFmax. These are environment-specific guidance values, not a short-test pass/fail rule.

2. CDC / NIOSH — Sound Level Meter App — measurement and calibration ↗Measurement methodsTechnical specifications / Frequently asked questions · 2024

   Explains A, C and Z weighting, LAeq and other metrics, and calibration of validated equipment. Its accuracy claims apply to the NIOSH iOS app and specified hardware, not to this browser tool.

3. NIH / NIDCD — Noise-induced hearing loss — level, distance and duration ↗Hearing contextWhat sounds cause noise-induced hearing loss? · Reviewed 2026

   Describes how level, distance and duration influence hearing risk, with common sound examples. It does not set a bedroom, living-room or office comfort target.

4. WHO — Safe listening — sound exposure and listening habits ↗Listening contextHow can I protect my ears? / Sound intensity and listening duration · 2026

   Provides general listening and volume-management advice. Its sound examples and listening-duration information are not used as room-specific comfort thresholds.

5. NIH / NIDCD — Hearing protectors — reducing exposure to loud sound ↗Loud-sound precautionsWhat are hearing protectors? / When should you wear hearing protectors? · Reviewed 2026

   Supports turning down sound, moving away, and using appropriate protection when loud exposure cannot be avoided. Covering the ears is a temporary response to unexpected loud sound, not a substitute for appropriate protection.

Evidence reviewed 2026-10-28. Room references are guidance for the stated conditions, not a universal “healthy dB” cutoff or legal assessment. Practical check steps are Divoom editorial suggestions.