It's five weeks to Polling Day. As part of our investigation into how different BBC networks are covering the election, Roger Bolton talks to the political team of Radio 1's Newsbeat. Young listeners ask editor Louisa Compton how the coverage will be tailored to the age and interests of the Radio 1 audience.

And what effect did the sounds of a glacier, a football crowd and a dawn chorus have on our listeners? Sound recordist Chris Watson produced a series of audio postcards - each Exploring the sound of a spectacular natural event in compressed time. Chris Watson explains how he risked life and limb in the middle of the Kalahari Desert - but which of the sounds was the most challenging to record?

Sound also infiltrated the Today Programme this week. Sarah Montague visited the café of the Tyneside Cinema in Newcastle as part of their coverage of '100 constituencies in 100 days' - but did clattering background noise make it too difficult to listen.

Radio 4 Drama 'Far Side of the Moore' brought astronomer and former BBC presenter Patrick Moore's voice back to life. Listeners praise actor Tom Hollander for his authentic portrayal of the late astronomer's quirks and eccentricity.

And the results of the Feedback twitter challenge are revealed - did anyone correctly guess which animal inspired our alternative Tweet of the Day?

Producer: Karen Pirie
A Whistledown production for BBC Radio 4.