Considerations - Hitachi YUTAKI S Series Technical Catalogue

4 Acoustic characteristic curves

Considerations

4.1 Considerations
1 Distance of the unit from the measuring point: At 1 meter from the unit's front surface; 1,5 meter from floor level.
2 The data is measured in an anechoic chamber, so reflected sound should be taken into consideration when installing
the unit.
3 The sound measured with the curve A shown in dB(A) represents the attenuation in function of frequency as
perceived by the human ear.
4 Reference acoustic pressure 0 dB=20 μPa
68 TCGB0123 rev.2 - 10/2019
Outdoor unit