Haier BD-478A service manual What are the national stipulations for freezer Noise?

Answer: This is because the affection of freezer noise to people is relative to the level of environmental sound. In noisy city or shops, people feel the noise is little, while in countryside or quiet living room will feel the same noise greater. This is the reason that people feel the freezer gets noisier at home than at shop.

12.6.10What are the national stipulations for freezer

noise?

Answer: Regarding the side effect of noise to people’s health and the technological level freezer industry can reach at present, standardized stipulations for freezer noise is made in national standard GB8059.1-87: family use freezer with the volume below 250L, noise≤52 dB(A) sound power level. The noise at offices we stay everyday or other public places is much higher than this freezer noise.

12.6.11 Why freezer noise measured at home is incorrect?

Answer: Because at home there is not the environment conditions for freezer noise measuring, and the value measured is not effective. The conditions for noise measuring are stipulated in national standard as the followings:

MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting

(1) In semi-sound eliminating room or in sound eliminating room without sound wave reflection.

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