Township of Lower Merion, PA
Montgomery County
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Table of Contents
Table of Contents

§ 105-2 Excessive noise prohibited.

It shall be unlawful for any person, in the operation of an air-conditioning unit or units and equipment or other types of mechanical equipment or apparatus installed in or attached to buildings or located on premises appurtenant to buildings, to make or produce excessive noise, thereby causing annoyance, inconvenience or detriment to the public or to any other person or persons. Noise shall be considered excessive if the sound pressure from the air-conditioning unit or units and equipment or other type of mechanical equipment or apparatus exceeds the limits hereinafter set forth.

§ 105-3 Maximum permissible sound pressure levels.

A. 
During daytime hours, the maximum permissible sound pressure levels at specified points of measurement for continuous noise radiated from premises shall not exceed the following:
Sound Pressure Level
Decibels Re 0.0002 Microbar
Frequency Band
(cycles per second)
Inside Table
Outside Table
20 to 75
73
76
75 to 150
66
69
150 to 300
60
64
300 to 600
55
59
600 to 1,200
52
57
1,200 to 2,400
50
55
2,400 to 4,800
48
53
4,800 to 10,000
47
52
B. 
During nighttime hours, the maximum permissible sound pressure levels at specified points of measurement for continuous noise radiated from premises shall not exceed the following:
Sound Pressure Level
Decibels Re 0.0002 Microbar
Frequency Band
(cycles per second)
Inside Table
Outside Table
20 to 75
69
76
75 to 150
62
69
150 to 300
56
64
300 to 600
50
59
600 to 1,200
47
57
1,200 to 2,400
45
55
2,400 to 4,800
43
53
4,800 to 10,000
42
52
C. 
When the source of complaint originates inside of a building or structure, the microphone shall be placed three feet from the nearest window in the room where the source of complaint originates and not less than three feet above the floor, in which case the inside table of sound pressure levels shall be used.
D. 
When the source of complaint originates outside, the microphone shall be placed at the source of the complaint but no closer than three feet to any wall and not less than three feet above the ground, in which case the outside table of sound pressure levels shall be used.
E. 
If, as a result of such test, the air-conditioning unit and equipment or other mechanical equipment or apparatus is found to violate the provisions of this chapter, the operation thereof shall forthwith be discontinued and not be resumed unless and until proper corrections have been made therein, which shall first have been approved by the Director.

§ 105-4 Sporadic noise.

No person shall create any sporadic noise which, when measured in the frequency band of 600 to 1,200 cycles per second, exceeds a sound pressure level of 57 decibels during daylight hours or 52 decibels during nighttime hours.

§ 105-5 Measurement instrument.

Sound levels shall be measured with a sound level meter and associated octave band analyzer manufactured according to standards prescribed by the American Standards Association.

§ 105-6 Exemptions.

A. 
Traffic noises, noises created by governmental units and noises created by emergency and civil defense activities shall be exempt from the application of this chapter.
B. 
Noises created by construction work and the repair and maintenance of any building or structure shall be exempt, but only during the hours of 8:00 a.m. to 6:00 p.m.

§ 105-7 through § 105-20. (Reserved) [1]

[1]
Editor's Note: See Ch. 111, Peace and Good Order, Art. VI, Disorderly Conduct Generally.