Pennsylvania Code
Title 67 - TRANSPORTATION
Part I - Department of Transportation
Subpart A - Vehicle Code Provisions
Article VII - Vehicle Characteristics
Chapter 157 - ESTABLISHED SOUND LEVELS
Subchapter F - CORRECTION FACTORS
Section 157.51 - Microphone distance correction factors
Universal Citation: 67 PA Code ยง 157.51
Current through Register Vol. 54, No. 52, December 28, 2024
If the distance between the microphone location point and the microphone target point is other than 50 feet (15.2 meters), the maximum observed sound level reading generated by the motor vehicle in accordance with § 157.44 (relating to measurement procedures) shall be corrected as specified in the following table:
TABLE 2
Distance Correction Factors
| If the distance between the microphone location point and the microphone target point is | Sound levelcorrection factor dB (A) |
| 26-29 feet | -7 |
| 29-32 feet | -6 |
| 32-35 feet | -5 |
| 35-39 feet | -3 |
| 39-43 feet | -2 |
| 43-48 feet | -1 |
| 48-58 feet | 0 |
| 58-70 feet | +1 |
| 70-83 feet | +2 |
| 83-99 feet | +3 |
| 99-118 feet | +4 |
Disclaimer: These regulations may not be the most recent version. Pennsylvania may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
This site is protected by reCAPTCHA and the Google
Privacy Policy and
Terms of Service apply.
