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Kansas City, MO Noise from Specific Sources: Low-Frequency Bass Limits (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Legal test
Bass detection alone proves plainly audible
Residential boundary
50-ft plainly-audible limit
Vehicle stereo, daytime
Not audible beyond 50 feet
Vehicle stereo, nighttime
Not audible beyond 25 feet
Enforcement
Health Department and police

Summary

Kansas City's noise code lets officers cite bass noise on hearing alone: a detectable rhythmic bass component from a stereo or speaker counts as 'plainly audible' sound, no decibel meter or song ID required.

Plainly audible means any sound that can be detected by a person using his or her unaided hearing faculties of normal acuity. As an example, if the sound source under investigation is a portable or vehicular sound amplification or reproduction device, the detection of the rhythmic bass component of the music is sufficient to verify plainly audible sound. The noise control officer or police officer need not determine the title, specific words, or the artist performing the song.

Real property boundary means an imaginary line along the ground surface, and its vertical extension, which separates the real property owned by one person from that owned by another person, but not including infra-building real property divisions.

Receiving property means a property from which a noise from another property is heard. A receiving property is often a complainant's property.

Residential property means property that does not come within the definition of "commercial property" in this section. When a property is located in an overlay district, the underlying zoning district will apply.

Soft test site means any test site having the ground surface covered with grass, other ground cover, or similar absorptive material for half or more of the distance between the microphone target point and the microphone location point.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 139 | Zoning and Development Code: Supplement 38).

Full Breakdown

Chapter 46's definition of 'plainly audible' specifically targets bass: if the rhythmic bass component of music from a portable or vehicular sound system can be detected, that alone proves a plainly-audible violation (§ 46-3). City Code § 46-4(b) separately bars noise plainly audible across a residential property line 50 feet or more away. For vehicle stereos, § 46-5(6) caps audibility at 50 feet from 8:00 a.m. to 10:00 p.m. and tightens to 25 feet overnight (10:00 p.m.-8:00 a.m.). The Health Department and police enforce both this standard and Table I's octave-band decibel limits, which regulate even the lowest 31.5 Hz band.

Violations & Fines

First violation: $100 fine, administrative or court. Repeat violations within 12 months escalate to $300 (2nd), $500 (3rd), and $1,000 plus up to 180 days jail (4th+). Each day counts as a separate offense.

Frequently Asked Questions

Can police cite bass noise without a decibel meter?
Yes. Detecting the rhythmic bass component of music is enough to prove 'plainly audible' sound under § 46-3: no meter reading or song identification is required.
How far can car stereo bass legally carry in Kansas City?
No more than 50 feet in any direction from 8:00 a.m. to 10:00 p.m., tightening to 25 feet between 10:00 p.m. and 8:00 a.m., under § 46-5(6).

Sources & Official References

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