| 摘要 |
<p>The invention relates to a method of evaluating the noise emitted by a hairdryer of longitudinal axis ? with a forward outlet, method comprising the following steps: implementation of a dummy human head (T) with two microphones, one placed at the level of the left ear and the other at the level of the right ear of the dummy head on each side of the sagittal plane S, of symmetry of the head, placement of the hairdryer while operating on a rear side of the head with the outlet oriented towards the head (T) and situated a distance (D) from the head lying between 5 cm and 20 cm, the longitudinal axis (?) of the hairdryer being included in a vertical plane (V) making an angle a of between 30° and 50° with the sagittal plane S, of symmetry of the head T, and positioning of the longitudinal axis (?) of the hairdryer in a horizontal plane (H) passing through the microphones, then measurement of the left and right acoustic pressure by the microphones and calculation of the mean dB1 of these two measurements, positioning of the longitudinal axis (?) of the hairdryer with the outlet oriented downwards, in an inclined plane (P) making with the horizontal plane an angle (ß) of between 30° and 50°, then measurement of the left and right acoustic pressure by the microphones and calculation of the mean dB2 of these two measurements.</p> |
