Question R14 Q25 - NSB Round Robin 2013

Most sounds are point sources or line sources. Which of the following is true of a line source?

W) The sound produces spherical spreading and noise level decreases by 3 decibels when distance is doubled

X) The sound produces spherical spreading and noise level decreases by 6 decibels when distance is doubled

Y) The sound produces cylindrical spreading and noise level decreases by 3 decibels when distance is doubled

Z) The sound produces cylindrical spreading and noise level decreases by 6 decibels when distance is doubled

Science Bowl Question