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About this tool
Play low-stimulation noise loops for anxious pets and size the level so fireworks are masked without unsafe volume.
This tool generates a low-stimulation noise loop for an anxious animal and calculates how loud that loop has to be to stop firework peaks standing out. It combines the room's own sound level with the playback level using decibel addition (10·log10 of summed energy), applies the inverse-square law to work out what actually reaches the pet, and caps the answer at the WHO 70 dB(A) all-day guideline. It is aimed at owners who want the sound loud enough to work and quiet enough to leave running for hours.
Open Pet Calming Sound Player on AltFTool — it loads instantly in your browser.
Add your input to the workspace.
Adjust the options until the result looks right.
Copy or download the output and put it to work.
Shows the actual dB(A) reaching the animal, not an abstract 0-100 volume slider.
Suggestions are capped at 70 dB(A) and flagged against the 85 dB(A) exposure limit.
Filter corners follow published hearing ranges for dogs, cats and small pets.
Steady, low-frequency broadband noise — brown noise rolled off below roughly 800 Hz — because it sits in the same band as the firework thud and has no onsets of its own. Dogs hear from about 67 Hz to 45 kHz and are most sensitive near 4 kHz, so bright hissy noise is more arousing than helpful. Slow classical music at 50-60 bpm is the other option supported by kennel research.
Keep it at or below 70 dB(A) at the animal's position, which is the WHO 24-hour guideline below which no hearing damage is expected. That is roughly the level of a normal conversation held a metre away. Above 85 dB(A) you are into the NIOSH 8-hour exposure limit and the noise itself becomes the problem.
It can reduce how much peaks stand out, but it cannot remove them. If a bang reaches 82 dB(A) indoors and your background is 55 dB(A), the peak still pokes 27 dB above the room, which is plainly startling. Masking works best when the gap is 10 dB or less, which usually means moving the animal to an interior room rather than turning the speaker up.
Yes. The noise is synthesised in the page with the Web Audio API, so nothing is downloaded and nothing is uploaded. Browsers require a tap or click before audio can start, so press play once on the page; leaving the tab in the background may still suspend audio on some mobile browsers.