acoustics 2 [vynechat] akustika 2 [vynechat] sound propagation šírenie zvuku 2 [vynechat] fyzikálne zákony 1 [vynechat] hluk 1 [vynechat] noise 1 [vynechat] physical laws 1 [vynechat] protection against noise 1 [vynechat] protihlukové opatrenia 1 [vynechat] sound 1 [vynechat] technical acoustics 1 [vynechat] technická akustika 1 [vynechat] vibration 1 [vynechat] vibrácie 1 [vynechat] zvuk 1 [vynechat]