I recently removed the popcorn ceiling in my small master bathroom for aesthetic reasons expecting to not have any change in the acoustics in the bathroom. The painter scraped the ceiling and it looked much more modern without the heavy texture; however, there was an echo every time I spoke. Once when I was working in Plano on a paint job, a painter informed me that the acoustic ceiling did insulate from sound, but in that house the floors were carpeted and it was not as noticeable when the acoustic ceiling was removed. In my bathroom, with the ceramic tile and stripped ceiling, the sound was bouncing off the walls and floor. It was something I was going to have to get used to if I wanted a fashionable ceiling.