Sound pressure (level)

Sound power and acoustic properties of a room determine sound pressure and thus the perceived loudness in the room. Auditory impressions in the human ear are caused by sound pressure p which affects the eardrum. The threshold of hearing is located around 2 · 10−4 μbar; the threshold of pain is located around 2 · 10+2 μbar. Due to the complex range of 6 decimal powers and also due to the physiological perception of loudness, the sound pressure level was introduced as a logarithmic scale. The logarithmic ratio of a noise source’s sound pressure p to the hearing threshold pressure p0 is expressed as the sound pressure level LP (often also referred to as sound level) in decibels (dB).

with the reference pressure (hearing threshold) of

Table 3.153: Values for the sound pressure level of typical sound sources
3.2.1.16.1 Room acoustics
3.2.1.16.3 A-rating

SUBJECT SEARCH

  1. Luminaires
    1. Luminaires
    2. The enhanced concept of quality
    3. Photometric classification
    4. Photometric properties
    5. Photo biological safety
    6. Mounting and electrical connection
    7. Luminaire labelling
    8. Luminaire operation
    9. LED luminaire operation
    10. Operation of FL luminaires
    11. Electrical safety
    12. Fire protection
    13. Electromagnetic safety
    14. Mechanical safety
    15. Chemical and miscellaneous impact
    16. Acoustic properties
      1. Room acoustics
      2. Sound pressure (level)
      3. A-rating
      4. Sound power level
      5. Equivalent sound absorption
      6. NR curve
      7. Air exhaust luminaires
      8. Acoustic measurements
    17. Ventilation properties
  2. Specific requirements on luminaires
  3. Luminaire selection
  4. Light management
  5. Light sources
Download article PDF
Artikel in Merkliste speichernLink in Merkliste speichern