Som man råber i skoven, får man svar - Center for Ligebehandling af ...
Som man råber i skoven, får man svar - Center for Ligebehandling af ...
Som man råber i skoven, får man svar - Center for Ligebehandling af ...
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42 dBA<br />
10 m<br />
48 dBA<br />
5 m<br />
the distance problem<br />
54 dBA<br />
2,5 m<br />
60 dBA<br />
1 m<br />
A typical teacher’s voice m easures<br />
60-65dB at a distance of four feet –<br />
only enough <strong>for</strong> the front row to hear clearly!