The term irrelevant sound effect (ISE) refers to a significant reduction in the immediate serial recall of lists of presented items, usually digits or letters, when irrelevant auditory sound is presented together with the items to be memorized. This study aimed to investigate the impact of signal-to-noise ratio (SNR) and presentation modality on short-term memory performance. The listening experiment was conducted on 10 adults. The established serial-recall paradigm is used, which allows the evaluation of short-term memory performance. Statistical analysis showed that changes in SNR within the chosen range do not have significant effect on the accuracy or reaction time of the memory tasks, while the presence of irrelevant background noise has a greater impact on the accuracy of the auditory tasks compared to the visual tasks.

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