How were Goten and Trunks able to hear Piccolo from within the Hyperbolic Time Chamber if the Chamber is supposed to be cut off into a different dimension in Dragon Ball Z?

In "Dragon Ball Z," Goten and Trunks are able to hear Piccolo from within the Hyperbolic Time Chamber due to a special connection and the unique properties of the chamber. While it is indeed a different dimension, the chamber has been shown to allow for some forms of communication, especially when emotions are strong or when the characters are particularly focused. This suggests that the bond between them and Piccolo transcends the usual limitations of the space. Additionally, the narrative often prioritizes character connections over strict adherence to the rules of the setting.