Muscat8 years ago000I would be interested to know whether these Lightbulbs also emit a high-frequency whistling sound, as I know from my Philips LivingColors Iris.Show in original language (German)kay225378 years ago+110 Helpful answerso i don't hear any whistling!Show in original language (German)CommentUrsOnMac8 years ago+110I can't hear anything myself, but when you're over 50, the high frequencies are no longer so audible.Show in original language (German)Comment