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Category: Atmospheric Pollution / Noise Pollution
Regulations, Current, Last revision on November 24 2004
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Civil Aircraft Noise Control Standards

9 Articles Revised and Promulgated by EPA Huan-Shu-Kong-Tzu Order No. 0930083349 and MOTC Ban-Fa-Tzu No. 3B000080 on November 24, 2004
Article 1 [繁體中文]

These standards are determined pursuant to Article 9, Paragraph 3 of the Noise Control Act

Article 2 [繁體中文]

Testing of civil aircraft noise levels shall be performed in accordance with effective perceived noise (EPN), A-weighting maximum noise level, or sound exposure level (SEL) regulations in ISO-3891. The units employed are EPNdB, LAmaxdB, and SEL dB, respectively.

Article 3 [繁體中文]

Noise control standards for subsonic jet aircraft for which a prototype airworthiness certificate application was made by October 6, 1977 are shown in the following table:

Test points Take-off weight Weight greater than or equal to 272,000 kg Weight less than or equal to 34,000 kg Weight between 34,000 kg and 272,000 kg
Approach noise level 108 102 91.83+6.64 log M
Transverse noise level 108 102 91.83+6.64 log M
Take-off noise level 108 93 67.56+16.61 log M
Remarks
  1. Approach noise level measurement points: starting from a point 300 meters inward from the head of the runway (the touchdown point), follow the three-dimensional glide angle and locate the point where the descent path has a vertical elevation of 120 meters (395 feet), which will be 2,000 meters beyond the head of the runway.
  2. Transverse noise level measurement point: a point on a surface transverse to the aircraft take-off point and 650 meters distant from the center line of the runway.
  3. Take-off noise level measurement point: a location 6.5 kilometers away from the central line of the runway starting from the point at which an aircraft begins taxiing.
  4. Measurement units are EPNdB; M represents the maximum take-off weight (1,000 kg).
Article 4 [繁體中文]

Noise control standards for subsonic jet aircraft for which a prototype airworthiness certificate application was made by October 6, 1977 and where the aircraft design was modified after November 26, 1981 are shown in the following table:

Test points Number of engines Maximum take-off weight (kg) Noise control standards when the take-off weight is greater than or equal to the upper limit Minimum take-off weight (kg) Noise control standards when the take-off weight is less than or equal to the lower limit Noise control standards when the take-off weight is between the upper and lower limits
Approach noise level 280,000 108 35,000 101 89.03.+7.75 log M
Transverse noise level 400,000 106 35,000 97 83.87+8.51 log M
Take-off noise level Two or less 325,000 104 48,300 93 70.62.+13.29 log M
Three 325,000 107 43,000 93 The standard is 67.56+16.61 log M when the weight is between 34,000 kg and 66,720 kg, and 73.62+13.29 log M when between 66,720 kg and 325,000 kg
Four or more 325,000 108 43,000 93 The standard is 67.56+16.61 log M when the weight is between 34,000 kg and 133,450 kg, and 73.62+13.29 log M when between 133,450 kg and 325,000 kg
Remarks
  1. All noise level measurement points are the same as in Notes 1, 2, and 3 in Article 3.
  2. Measurement units are EPNdB; M represents the maximum take-off weight (1,000 kg).
Article 5 [繁體中文]

Noise control standards for subsonic jet aircraft for which a prototype airworthiness certificate application was made after October 6, 1977 are shown in the following table:

Test points Number of engines Maximum take-off weight (kg) Noise control standards when the take-off weight is greater than or equal to the upper limit Minimum take-off weight (kg) Noise control standards when the take-off weight is less than or equal to the lower limit Noise control standards when the take-off weight is between the upper and lower limits
Approach noise level 280,000 105 35,000 98 86.03+7.75 log M
Transverse noise level 400,000 103 35,000 94 80.87+8.51 log M
Take-off noise level Two or less 385,000 101 48,100 89 66.65+13.29 log M
Three 385,000 104 28,000 89 69.65+13.29 log M
Four or more 385,000 106 20,200 89 71.65+13.29 log M
Remarks
  1. Apart from the transverse parallel distance of 450 meters, all noise level measurement points are the same as in Notes 1, 2, and 3 in Article 3.
  2. Measurement units are EPNdB; M represents the maximum take-off weight (1,000 kg).
Article 6 [繁體中文]

Noise control standards for propeller aircraft are shown in the following tables in accordance with their maximum take-off weight and date of application for a prototype airworthiness certificate.

  1. Noise control standards for propeller aircraft with a maximum take-off weight greater than 5,700 kg for which a prototype airworthiness certificate application was made by December 31, 1984 are shown in the following table:

    Test points Take-off weight greater than or equal to 384,700 kg Take-off weight less than or equal to 34,000 kg Take-off weight between 34,000 kg and 384,700 kg
    Approach noise level 105 98 87.83.83+6.64 log M
    Transverse noise level 103 96 85.83.83+6.64 log M
    Take-off noise level Take-off weight greater than or equal to 358,900 kg Take-off weight less than or equal to 34,000 kg Take-off weight between 34,000 kg and 358,900 kg
    106 89 63.56.56+16.61 log M
    Remarks
    1. Apart from the transverse parallel distance of 450 meters, all noise level measurement points are the same as in Notes 1, 2, and 3 in Article 3.
    2. Measurement units are EPNdB; M represents the maximum take-off weight (1,000 kg).

  2. Noise control standards for propeller aircraft with a maximum take-off weight in excess of 5,700 kg for which a prototype airworthiness certificate application was made from January 1, 1985 to November 17, 1988 are shown in the following table:

    Test points Number of engines Maximum take-off weight (kg) Noise control standards when the take-off weight is greater than or equal to the upper limit Minimum take-off weight (kg) Noise control standards when the take-off weight is less than or equal to the lower limit Noise control standards when the take-off weight is between the upper and lower limits
    Approach noise level 280,000 105 35,000 98 86.03+7.75 log M
    Transverse noise level 400,000 103 35,000 94 80.87+8.51 log M
    Take-off noise level Two or less 385,000 101 48,100 89 66.65+13.29 log M
    Three 385,000 104 28,600 89 69.65+13.29 log M
    Four or more 385,000 106 20,200 89 71.65+13.29 log M
    Remarks
    1. Apart from the transverse parallel distance of 450 meters, all noise level measurement points are the same as in Notes 1, 2, and 3 in Article 3.
    2. Measurement units are EPNdB; M represents the maximum take-off weight (1,000 kg).

  3. Noise control standards for propeller aircraft with a maximum take-off weight of less than 9,700 kg for which a prototype airworthiness certificate application was made by November 16, 1988 are shown in the following table:

    Test points Take-off weight greater than or equal to 1,500 kg Take-off weight less than or equal to 600 kg Take-off weight between 600 kg and 1,500 kg
    noise level 80 68 68+13.33 (M-0.6)
    Remarks
    1. The aircraft shall pass the measurement point in level flight at an altitude of 300-10+30 meters, and pass near a vertical line above the measurement point.
    2. Measurement units are LAmaxdB; M represents the maximum take-off weight (1,000 kg).

  4. Noise control standards for propeller aircraft with a maximum take-off weight greater than 9,000 kg for which a prototype airworthiness certificate application was made after November 17, 1988 are shown in the following table:

    Test points Number of engines Maximum take-off weight (kg) Noise control standards when the take-off weight is greater than or equal to the upper limit Minimum take-off weight (kg) Noise control standards when the take-off weight is less than or equal to the lower limit Noise control standards when the take-off weight is between the upper and lower limits
    Approach noise level 280,000 105 35,000 98 86.03+7.75 log M
    Transverse noise level 400,000 103 35,000 94 80.87+8.51 log M
    Take-off noise level Two or less 385,000 101 48,100 89 66.65+13.29 log M
    Three 385,000 104 28,600 89 69.65+13.29 log M
    Four or more 385,000 106 20,200 89 71.65+13.29 log M
    Remarks
    1. Apart from the transverse parallel distance of 450 meters, all noise level measurement points are the same as in Notes 1, 2, and 3 in Article 3.
    2. Measurement units are EPNdB; M represents the maximum take-off weight (1,000 kg).

  5. Noise control standards for propeller aircraft with a maximum take-off weight of less than 9,700 kg for which a prototype airworthiness certificate application was made after November 17, 1988 are shown in the following table:

    Test points Take-off weight greater than or equal to 1,400 kg Take-off weight less than or equal to 600 kg Take-off weight between 600 kg and 1,400 kg
    noise level 88 76 83.23+32.67 log M
    Remarks
    1. The aircraft shall pass the measurement point in level flight at an altitude of 300-10+30 meters, and pass near a vertical line above the measurement point.
    2. Measurement units are LAmaxdB; M represents the maximum take-off weight (1,000 kg).

Either standards may be applied when the situation simultaneously conforms to the conditions in Subparagraph 1 and Subparagraph 3 of the foregoing paragraph. The same when the situation simultaneously conforms to the conditions in Subparagraph 2 and Subparagraph 3 of the foregoing paragraph. The noise control standards in Paragraph 1 are not applicable to stunt, agricultural, and fire fighting propeller aircraft.

Article 7 [繁體中文]

Noise control standards for helicopters for which a prototype airworthiness certificate application has been made shall comply with the regulations in Table 1.However, noise control standards for helicopters with a maximum take-off weight of less than 2,730 kg for which a prototype airworthiness certificate application was made after November 11, 1993 may comply with the regulations of Table 2.

Table 1
Test points Take-off weight greater than or equal to 80,000 kg Take-off weight less than or equal to 788 kg Take-off weight between 788 kg and 80,000 kg
Take-off noise level 109 89 90.03+9.97 log M
Approach noise level 110 90 91.03+9.97 log M
Hover noise level 108 88 89.03+9.97 log M
Remarks
  1. Take-off noise level measurement point: a point 500 meters horizontally in the direction of flight and points 150 meters on either side of the ground flight path base point.
  2. Approach noise level measurement points: when the aircraft's approach flight path has a 6ｰ glide angle, the point beneath the aircraft when its altitude is 120 meters, which is 1,140 meters distant from the point of intersection with the ground. Points 150 meters on either side of the ground flight path base point.
  3. Hover noise level measurement points: below the flight path of the aircraft when its altitude is 150 meters.
  4. Measurement units are EPNdB; M represents the maximum take-off weight (1,000 kg).
Table 2
Test points Take-off weight equal to 2,730 kg Take-off weight less than or equal to 788 kg Take-off weight between 788 kg and 2,730 kg
Hover noise level 87 82 82+3 [log (M/0.788)/log(2)]
Remarks
  1. Hover noise level measurement points: below the flight path of the aircraft when its altitude is 150 meters.
  2. Measurement units are SEL dB; M represents the maximum take-off weight (1,000 kg).
Article 8 [繁體中文]

Volume testing procedures and method for measuring civil aircraft noise shall be carried out in accordance with Conventions on International Civil Aviation Annex 6.

Article 9 [繁體中文]

These Standards shall take effect on the date of promulgation.

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