un·heard 
/ˌʌnˈhɚd/ adjective
/ˌʌnˈhɚd/ adjective 1 : not given attention
▪ The students' concerns went unheard [=were ignored] by the school's administration. 2 : not heard or listened to
▪ Their cries for help were unheard. ▪ a previously unheard recording
▪ The students' concerns went unheard [=were ignored] by the school's administration.
▪ Their cries for help were unheard. ▪ a previously unheard recording
