Hi,
Not sure that [https://www.dell.com/support/kbdoc/en-au/000139830/how-do-i-eliminate-the-beep-tones-that-my-portable-system-emits-during-the-boot-process-technical-tip-147912|this] will work or even if the option is available in your particular model but maybe worth a look anyway.
The [https://dl.dell.com/manuals/all-products/esuprt_laptop/esuprt_inspiron_laptop/inspiron-15z-5523_owner%27s%20manual_en-us.pdf|manual] for your model doesn't show the BIOS menu options