Low-frequency noise complaints: a property management reference.

Tenant complaints involving low-frequency noise and vibration — typically attributed to subwoofers, bass-heavy audio systems, HVAC equipment, or industrial sources — present a distinct operational and risk-management challenge for landlords and property managers. The complaints are increasing. The conventional tools for verifying them do not work. And the consequences of mishandling them can include habitability claims, lease-break disputes, negative reviews, accelerated turnover, and in worst cases, tenant-on-tenant escalation that becomes a building liability event.

This page is intended as a practical reference for property owners and managers responding to these complaints, with downloadable tools to standardize intake and reduce risk.

Most multifamily noise complaint protocols assume the noise is audible to a third party — a manager, maintenance staffer, or responding officer — and that the source can be identified by ear. Low-frequency noise frequently does not meet either condition.

Sound below approximately 100 Hz passes through standard residential wall and floor construction with minimal attenuation. Below 20 Hz, the energy is generally inaudible to most people, while still capable of producing pressure sensations, vibration, and a documented range of physiological effects in chronically exposed residents. The peer-reviewed evidence base on these effects has grown substantially in the last five years — see, for example, Scatterty et al. (2026) on cortisol elevation from 18 Hz exposure, Ascone et al. (2021) on grey matter changes from 28-night bedroom infrasound exposure, and Baliatsas et al. (2016) on neurological symptoms associated with residential low-frequency noise exposure in general populations.

The single most valuable change a property management operation can make is to standardize intake on these complaints. A structured intake replaces "he said, she said" reporting with documented information that scales across properties and protects the building from later disputes.

A recommended intake form should capture:

Most properties do not have access to Z-weighted or low-frequency acoustic measurement equipment, and full professional acoustic assessment costs $1,000–$6,000 per investigation. Within current capabilities, the following steps are reasonable and defensible:

• • Have a maintenance or building staff member spend an extended period (not a brief walk-through) in the complaining tenant's unit during a reported episode. While they may not perceive the source as audible, they may perceive vibration through floor or wall contact, particularly when sitting or lying down.
• • Compare the conditions in the complaining unit to other units in the building, particularly units adjacent to the same suspected source.
• • Track the pattern of complaints over time. Multiple complaints attributing to the same source unit substantially raise the probability of a legitimate issue.
• • Document each investigation step in writing, with timestamps.

A reasonable threshold for engaging professional acoustic measurement is:

• • Three or more complaints from the same unit, or
• • Two or more complaints from non-adjacent units attributing to the same source

At that threshold, the cost of professional assessment is small relative to the cost of a habitability claim, a contested lease termination, or a liability event. Engaging a professional also produces evidence that protects the building if the complaint turns out to be unfounded.

Professional acoustic measurement at infrasonic frequencies requires equipment compliant with ISO 7196:1995 (G-weighting for infrasound). A list of acoustical consultants with low-frequency measurement capability is available in the resources section of the main site.

Standard residential lease language addressing noise typically references "audible" disturbance or "reasonable" sound levels — language that does not contemplate low-frequency exposure. Updated lease addenda can address this directly.

A sample lease addendum addressing low-frequency noise, vibration, and equipment use is available below. It is offered as a starting point for review by the property's counsel and is not a substitute for legal advice.

For new construction and major renovations, low-frequency isolation is a design consideration that current building codes do not adequately address. Standard STC and IIC ratings, while required, do not measure performance below approximately 100–125 Hz. Buildings constructed to code minimums frequently transmit low-frequency energy efficiently between units.

Properties seeking to differentiate in premium markets, or to reduce future complaint risk, can engage acoustical consultants during design to specify improved low-frequency isolation — typically through mass, decoupling, deeper air gaps, and resilient mounting. The cost is meaningful but small relative to building-wide complaint and turnover risk.

For a broader regulatory framework on environmental noise impacts on building occupants, see the WHO Environmental Noise Guidelines for the European Region (2018).