Rashi writes in Masheches Beitzah 7b on the gemara about different cases of when we consider an egg found in a nest a fertilized or unfertilized egg. The gemara talks about a case when a hen can hear a roosters crow by day. Rashi writes on this that sound can be heard better at night then by day. Tosfos also makes this point.
My question is does this theory match modern day science,and was this a scientific belief in Rashi's times or was this a novel theroy of Rashi?
Rashi's words: שהקול אינו נשמע ביום כבלילה
Tosfos words: ובלילה משמיעין קולם למרחוק יותר מביום...