The impact sounds emitted by office equipment such as printers and copy machines are one of the major factors affecting their sound quality during operation. In the present study, impressions of the impulsiveness and overall perceptive sound quality (i.e., auditory pleasantness) of noises emitted by three types of office equipment (laser printers, multifunctional peripherals), and their attachments, such as automatic document feeders and duplex units) were measured by jury tests using adjective scales with seven Likert-type scale categories. The results showed that impressions of impulsiveness increased as the amplitude of impact sounds increased. Furthermore, impressions of impulsiveness were related to the auditory quality induced by the stimuli. Impulsiveness was highly correlated with the acoustic measure of the fifth percentile sound pressure level (L A5). Furthermore, to examine the criteria for the judgment of the improvement of impulsive sounds using L A5, the degree of botheration for the same stimuli was evaluated. The proportions of participants who evaluated the stimuli as bothersome were calculated for each stimulus. The relationship between the response rates and L A5 was obtained by logistic regression analysis. From the regression results, L A5 values of stimuli that were evaluated as being bothersome by more than half of the participants were around 56 dB for the three types of office equipment. We thus conclude that products emitting noise with L A5 values above 56 dB should be improved.