By Jess Jones Audioboom shares soared nearly 19 per cent on Tuesday as the podcast streamer posted record revenue and profit, and said it is set to “significantly outperform” expectations, especially with demand from the US election. The London-listed company booked record third quarter revenue of $18.8m (£14.4m), up from $14m (£10.7m) in the same period last year. It also posted record third quarter adjusted earnings before interest, tax, depreciation and amortisation (EBITDA) profit of $1m (£766,200), the fourth quarter of EBITDA profit in a row. Audioboom’s advertising marketplace Showcase …