Skip to main content

Table 1 Noise levels indicators in phase 1 and phase 2 (dB(A))

From: Impact of a visual indicator on the noise level in an emergency medical dispatch centre - a pilot study

Noise level (dB(A))

LAeq

Lmax

Lmin

L90

L50

L10

Phase 1

60.3

76.5

48.5

54.2

58.9

62.8

Phase 2

56.9

71.6

47.8

48.5

54.2

60.4

  1. L10: exceeded noise level for 10% of the measurement period (crest noise)
  2. L50: exceeded noise level for 50% of the measurement period (median noise)
  3. L90: exceeded noise level for 90% of the measurement period (background noise)
  4. The L10 and L90 are extensively used for impulsive sound levels and Background Noise respectively
  5. LAeq = Equivalent Sound Level. It quantifies the noise environment to a single value of sound level for any desired duration. This descriptor correlates well with the effects of noise on people
  6. Lmax = Maximum Sound Level: a maximum level during the measurement period
  7. Lmin = Minimum Sound Level during the measurement period
Back to article page

BMC Emergency Medicine

ISSN: 1471-227X

Contact us