1. An area or period where a signal (telecommunications, GPS, radio, etc.) is absent, blocked, or unable to be transmitted/received
The basement has a signal void due to thick concrete walls blocking cellular reception.
O porão tem uma zona sem sinal devido às paredes de concreto espesso bloqueando a recepção celular.
2. In technical contexts, a region where expected communication signals fail to reach or function
GPS signal void in the downtown tunnel makes navigation impossible.
A zona sem sinal GPS no túnel do centro torna a navegação impossível.