In order to maximize comfort and productivity, the workplace should provide employees with speech privacy and freedom from distracting noises. To meet these goals, acoustic professionals typically follow the “ABC Rule,” which stands for absorb, block and cover. Unfortunately, many current green design practices inadvertently contravene this formula, creating interiors that are noisy, stressful and lack speech privacy. But, using the ABC Rule correctly can contribute to the green commitment. Photo courtesy of K.R. Moeller Associates Ltd. Acoustics in green buildings are often worse than in their traditional counterparts as they generally feature a large percentage of open plan, creating