Detailed answer regarding Ceiling Fan Direction. During the summer, you want the air blowing directly on you so you will feel cooler from the wind chill effect (which is how fans cool you off). So stand under the fan and turn it up on high speed.
NRR STANDS FOR NOISE REDUCTION RATING. NRR (noise reduction rating) is a single number rating method which describes a hearing protection device (HPD) based on how much the overall noise level is reduced by the HPD. Most noise measurements in the industry are derived from the A-weighting scale.
Since this is the ratio of two different power value, the unit of RSRQ is dB and the value would be always negative (because RSSI value will aways be larger than N x RSRP) UE usually measures RSRP or RSRQ based on the direction (RRC message) from the network and report the value.