STR Noise Monitoring: Minut vs NoiseAware vs Party Squasher

Noise monitoring is increasingly table-stakes for serious STR operators, particularly in regulatory-restricted markets and HOA-governed properties. The devices use indoor microphones to measure decibel levels (without recording audio — privacy compliance is non-negotiable) and alert operators when thresholds are exceeded. Three vendors dominate: Minut (Swedish, popular in Europe and US), NoiseAware (US, popular with property managers), and Party Squasher (US, simpler/cheaper). Each handles the core function similarly with different operational features.

The three major options

What they actually do

All three measure indoor decibel levels via a Wi-Fi-connected microphone. They do NOT record audio (audio recording without consent is illegal in many jurisdictions and would violate guest privacy). When sustained noise exceeds thresholds you configure (typically 70-85 dB depending on time of day), the device sends alerts to your phone. Most also send guests automated warnings. The pattern: alert → guest receives warning → if continues → operator intervention or local-contact escalation.

Operational integration

• Place the device centrally in the property (living room or hallway typically).
• Set thresholds: 70 dB during day, 60 dB after 10pm typical for residential properties.
• Configure auto-text to guests on threshold breach (most devices support this).
• Have a local contact ready for escalation — the device alerts; the local contact responds in person.
• Document violations: many cities require a documented response protocol for noise-monitoring use.

How this affects tax strategy

Noise-monitoring devices are deductible operating expenses or, depending on cost and useful life, may be expensed under the de minimis safe harbor ($2,500 limit per item) or capitalized and depreciated. They're a small line item but materially reduce regulatory and HOA enforcement risk that could otherwise threaten the operating business itself. Cost-segregation studies don't typically reclassify these devices since they're already short-lived assets. See cost segregation for Airbnb properties for the full asset-classification framework.

Frequently asked questions