Savart's wheel
... that an experimental musical instrument based on Savart's wheel is said to make "the most obtrusive, obnoxious and irritating sound ever known"?
... that an <a href="./Experimental_musical_instrument" id="mwDWU" rel="mw:WikiLink" title="Experimental musical instrument">experimental musical instrument</a> based on <b id="mwDWY"><a href="./Savart_wheel" id="mwDWc" rel="mw:WikiLink" title="Savart wheel">Savart's wheel</a></b> is said to make "the most obtrusive, obnoxious and irritating <a href="./Sound" id="mwDWg" rel="mw:WikiLink" title="Sound">sound</a> ever known"?