Air I Noise I Water I Soil I Environmental Consultancy www.axisenv.ie Unit 5 Caherdavin Business Centre, Ennis Road, Limerick Unit 4, Osberstown Industrial Park, Caragh Road, Naas, Co. Kildare Environmental Noise Report Noise Survey 2016 Report Reference Number: 3350-16-04 Version: 1 Date of Issue: 28-08-2016 Report Compiled by: Jer Moore
Report Content 1.0 Executive Summary. 3 2.0 Introduction. 4 3.0 Methods Employed. 5 4.0 Monitoring Locations. 6 5.0 Noise Measurement Data. 8 6.0 Conclusions. 12 Report Date 26 th August 2016 Site Contact: Elaine Murray Report Issued By Mark Mc Garry Version No: 1 Signed: Client: Notes: Page 2 Report Number: 3350-16-04 Version 1
1.0 Executive Summary Limited is required as part of licence W0279-01; Conditions 4 and 6 to carry out a noise survey of the installation on an annual basis. AXIS environmental services were commissioned to complete the survey after proposal acknowledgment and acceptance by s Environmental Department. The purpose of the survey was to monitor noise at three boundary locations on the site as well as one noise sensitive location and assess the sites compliance against Schedule B limits. The survey was carried out in strict accordance with the standard ISO 1996 Parts 1 3, Acoustics description, measurement and assessment of environmental noise. Reference was also made to the EPA guidelines NG4 Guidance Note for Noise: Licence Applications, Surveys and Assessments in Relation to Scheduled Activities January 2016. All operations at were running as normal throughout the survey. There was significant interference from traffic movements on the M7 motorway and a nearby local access route that connects the R409 to Osberstown. There were other sources of noise at each individual location which are summarised in the report. The impact of road traffic noise could be a significant interference on the survey at certain locations as defined in the report. As outlined in the Standard ISO 1996 and the associated noise guidance document issued by the Agency, where traffic noise is interfering with noise measurements, it is acceptable to assess noise compliance against the LA90 for the monitoring period. This is a statistical measurement of the noise level exceeded for 90% of the time which would largely be associated with the facility under assessment. Four monitoring points were monitored for the noise survey. NM1, NM2 & NM3 are boundary monitoring points which are located within the confines of the site and are in close proximity to activities in operation. These monitoring locations would not be considered noise sensitive locations. NSL1 is a noise sensitive location which is located in close proximity to a local residence. This monitoring point is required to be compliant with noise emission limit values [Day 55dB(A), Evening - 50 db(a) & Night 45dB(A)] All monitoring points were determined to comply in full with licence requirements. There was no tonal or impulsive noise observed at either location for the duration of the assessment. Page 3 Report Number: 3350-16-04 Version 1
2.0 Introduction As part of compliance monitoring at, an annual noise survey is to be carried out at noise sensitive receptors in the vicinity of the plant. The Agency and have agreed on the monitoring points on the boundary of the site and at the nearest noise sensitive locations. The Waste licence W0279-01 outlines s requirements under Conditions 4 and 6, which have been documented as follows: 2.1 Condition 4: 4.4 Noise: Noise from the facility shall not give rise to sound pressure levels (LAeq, T) measured at the NSLs of the facility which exceed the limit value(s) 2.2 Condition 6: 6.12 The licensee shall carry out a noise survey of the site operations annually. The survey programme shall be undertaken in accordance with the methodology specified in the Guidance Note for Noise: Licence Applications, Surveys and Assessments in Relation to Scheduled Activities (NG4) as published by the Agency. Table 1: Schedule B4: Noise Monitoring Location Measurement Frequency NM1 NM2 NM3 NSL1 Three 30min Day Surveys One 30min Evening Survey Two 15min Night Surveys All including 1/3 rd octave measurements Three 30min Day Surveys One 30min Evening Survey Two 15min Night Surveys All including 1/3 rd octave measurements Three 30min Day Surveys One 30min Evening Survey Two 15min Night Surveys All including 1/3 rd octave measurements Three 30min Day Surveys One 30min Evening Survey Two 15min Night Surveys All including 1/3 rd octave measurements Annually Annually Annually Annually Page 4 Report Number: 3350-16-04 Version 1
3.0 Methods Monitoring was carried out in strict accordance with ISO 1996 Parts 1 3, Description and Measurement of Environmental Noise. Reference was also made to the EPA guidelines NG4 Guidance Note for Noise: Licence Applications, Surveys and Assessments in Relation to Scheduled Activities 2016,. Table 2: NG4 Noise Survey Recommendations Period Daytime (07:00 17:00) Evening (17:00 23:00) Night time (23:00 07:00) Table 3: Manufacturer Minimum Survey Duration outlined in NG4 4 hour survey with a minimum of 3 sampling periods at each noise monitoring location. 2 hour survey with a minimum of 1 sampling period at each noise monitoring location. 3 hour survey with a minimum of 2 sampling periods at each noise monitoring location. Equipment Details Amended Requirements by the Agency in NG4 FAQ Version 2 A minimum of 3 sampling periods at each noise monitoring location. A minimum of 1 sampling period at each noise monitoring location. A minimum of 2 sampling periods at each noise monitoring location. EPA FAQ Information Sample periods relate to the time set in the licence i.e. 15 or 30 minutes per point. This is only a requirement for new or revised licenses where the requirement is specified. Sample periods relate to the time set in the licence i.e. 15 or 30 minutes per point. Meter No 2 Meter No 3 Meter No 4 Cirrus Optimus Green Cirrus Optimus Green Cirrus Optimus Green Model CR:171B CR:172B CR:172B Serial Number G061082 G061817 G078197 Firmware V2.3.1156 V2.4.1529 V2.8.2327 Calibrator CR:511 Acoustic Calibrator CR:515 Acoustic Calibrator CR:515 Acoustic Calibrator Microphone B&K4180-1893453 B&K4180-1893453 B&K4180-1893453 Windshield Type UA:237 90mm Foam Windshield UA:237 90mm Foam Windshield UA:237 90mm Foam Windshield Calibration Date Noise Meter 20 th April 2016 2017 09 th October 2015-2016 30 th June 2016 2017 Certificate Number 227467 232526 238637 Calibrator 20 th April 2016 2017 09 th October 2015-2016 June 2016 2017 Certificate Number 227465 102905 106234 Page 5 Report Number: 3350-16-04 Version 1
4.0 Monitoring Locations 4.1 Noise Monitoring Point 1 (NM1) 4.1.1 Day Time Survey Noise monitoring point NM1 is located at the entrance of the site on the Southern boundary, close to the Main Process Building. The greatest source of noise at this location is the noise created by loaders filling lorries with glass and moving glass around the site. There were several other sources of noise noted at this monitoring point including continuous operational noise from the Main Process Building, for the most part made up of extraction fans operating and the movement of glass on conveyor belts. Other noises included trucks and other vehicles passing close by to the noise meter as they enter and exit the site, other on site traffic such as forklifts road traffic from the local access road outside the plant. 4.1.2 NM1 Evening Time Survey During evening time monitoring the main most prevalent sound noted was the continuous operation of the main processing plant nearby. The other dominant noise was that from the wheeled loaders moving around the site and moving glass. 4.1.3 NM1 Night Time Survey For the night time noise survey the main sources of noise were the operational noises from the Main processing building, continuous movements of traffic on the M7 motorway in the distance and wheeled loaders operating and moving glass. A light breeze could also be heard periodically. 4.2 Noise Monitoring Point 2 (NM2) 4.2.1 Day Time Survey This noise monitoring Point was located on the North Western boundary of the site, close to Storage Bays and the Drying Shed. The main source of noise at this location was the regular movement of traffic on the local access route nearby the monitoring location. Other sources of noise at this monitoring point include operational noise from the Drying Shed, the movement of traffic (trucks and forklifts) on site and sound of birds chirping. 4.2.2 Evening Time Survey There were several sources of noise noted during the evening noise survey including regular traffic movements on the local access route nearby, operational noise from the drying plant and main processing plant as well as wheeled loaders. A light breeze could be heard blowing intermittently. 4.2.3 Night Time Survey The main sources of noise during the night time noise survey were the occasional movements of traffic on the local access route nearby, continuous movements of traffic on the M7 motorway in the distance, light operational noises from the Main Process Building and a light breeze blowing. The drying plant was not running during the night time period. Page 6 Report Number: 3350-16-04 Version 1
4.3 Noise Monitoring Point 3 (NM3) 4.3.1 Day Time Survey Noise monitoring point NM3 was situated on the North Eastern boundary of the site, close to the main Storage Bays on site and the Main Process Building. The greatest source of noise at this location was from wheeled loaders moving glass around the storage areas. Other onsite traffic noted included forklifts and trucks moving. There were many other sources of noise also recorded in this location including operational noise from the main processing plant and drying plant, the distant sound of traffic movements from the M7 motorway and some noise from another site (possible construction noise) from a nearby site to the north of. 4.3.2 Evening Time Survey During the evening time noise survey the main sources of noise came from the loaders moving glass in the storage yard and operational noise from the main processing plant. Other sources of noise noted included traffic movements on the M7 motorway and a light breeze blowing. 4.3.3 Night Time Survey During the night time survey the main sources of noise were from the distant traffic movements on the M7 motorway and operational noise from the Main Production Building. Other noteworthy noise recorded at this location included a light intermittent breeze. 4.4 Noise Sensitive Location 1 (NSL1) 4.4.1 Day Time Survey This noise sensitive location, which is situated to the west of the site, is approximately 20m from a residence and just outside the boundary of. The main source of noise at this location were the intermittent movements of traffic on the local access route, which was located approximately 25m from the noise meter. Several other sources of noise were also noted in this area including general operational noise from, birds chirping in nearby vegetation, lorries entering and leaving the site and a light breeze blowing. 4.4.2 Evening Time Survey For the evening time noise survey, the greatest source of noise was the continuous movement of traffic on the M7 motorway. Also noted at this point was a faint operational noise from and a light breeze blowing. 4.4.3 Night Time Survey For the night time noise survey the noteworthy noises recorder were intermittent road traffic noise on the local access road and distant traffic noise from the M7 motorway. Light operational noise could be heard from the site. Page 7 Report Number: 3350-16-04 Version 1
5.0 Summary of Daytime Noise Measurements Noise Monitoring Location: NSL1(Noise sensitive location) 10-08-2016 Measured Noise Levels (db re. 2 x 10-5 Pa) Comments Period: Time LAeq LAFMAX LA90 13:36 44 58 42 Daytime: 14:36 43 52 41 14:36 44 57 42 Arithmetic Average (db): 44 56 42 For daytime monitoring at this point the most common noise noted was lorries entering and leaving the site. A light operational noise could be heard from Rehab Glassco. Other noise noted were light local traffic noise, a light breeze and birds chirping. Daytime Criterion, db LAr,T: 55 - - Evening: 21:43 45 64 43 Arithmetic Average (db): 45 64 43 Evening Criterion, db LAr,T: 50 - - 23:39 40 52 39 Night Time: 23:54 41 59 40 Arithmetic Average (db): 41 55.5 40 Night time Criterion, db LAr,T: 45 - - Weather Conditions: Traffic noise from the M7 motorway was the predominant noise recorded. A light breeze and faint operational noise from Rehab Glassco were also noted. Noise noted at night time included both local traffic noise and continuous traffic noise from the M7 motorway. Light operational noise could be heard from Rehab Glassco. Daytime: Evening: Night Time: Temperature ( O C) 12 11 11 Wind Speed (m/s) 2 1 2 Wind Direction: Southerly South Westerly South Westerly Precipitation (mm): 0.0 0.0 0.0 Tonal Noise Assessment Daytime: Run 1: None Run 2: None Run 3: None Evening: Run 1: None - - Night Time: Run 1: None Run 2: None - Compliance Status this site complies with both day, evening and night time criteria. Page 8 Report Number: 3350-16-04 Version 1
Noise Monitoring Location: NM1(Boundary Monitoring location) 10-08-2016 Measured Noise Levels (db re. 2 x 10-5 Pa) Comments Period: Time LAeq LAFMAX LA90 12:04 65 84 62 Daytime: 12:34 67 85 63 13:04 66 84 62 Arithmetic Average (db): 66 84 62 Local road traffic noise was the most predominant noise here. Other noises included lorries entering and leaving the site, lorries being filled with glass, operational noise from the processing plant and other on sit traffic. Daytime Criterion, db LAr,T: - - - Evening: 21:45 59 79 53 Arithmetic Average (db): 59 79 53 Evening Criterion, db LAr,T: - - - 23:04 59 86 58 Night Time: 23:19 59 66 58 Arithmetic Average (db): 59 76 58 Night time Criterion, db LAr,T: - - - Weather Conditions: Operational noise from the main processing plant and wheeled loaders moving around glass were the most predominant noises noted. At night time the main processing plant caused the majority of noise. Daytime: Evening: Night Time: Temperature ( O C) 12 11 11 Wind Speed (m/s) 2 1 2 Wind Direction: Southerly South Westerly South Westerly Precipitation (mm): 0.0 0.0 0.0 Tonal Noise Assessment Daytime: Run 1: None Run 2: None Run 3: None Evening: Run 1: None - - Night Time: Run 1: None Run 2: None - Compliance Status this is not a noise sensitive location Page 9 Report Number: 3350-16-04 Version 1
Noise Monitoring Location: NM2(Boundary Monitoring location) 10-08-2016 Measured Noise Levels (db re. 2 x 10-5 Pa) Comments Period: Time LAeq LAFMAX LA90 11:41 55 76 47 Daytime: 12:11 54 69 46 12:41 57 73 53 Arithmetic Average (db): 55 73 49 The most predominant noise source at this point was from traffic on the local access road to the rear of the facility. Other sources noted were movement of onsite traffic and operational noise from the drying plant. Daytime Criterion, db LAr,T: - - - Evening: 21:50 51 67 47 Arithmetic Average (db): 51 67 47 Evening Criterion, db LAr,T: - - - 23:02 50 66 44 Night Time: 23:17 49 66 44 Arithmetic Average (db): 50 66 44 Night time Criterion, db LAr,T: - - - Weather Conditions: Again local traffic was the most predominant noise source. The drying plant and main processing plant produced noise as well wheel loaders operating on site. At night traffic noise from both the local access road and the M7 motorway could be heard. The drying plant was not running but there was operational noise from the main processing plant. Daytime: Evening: Night Time: Temperature ( O C) 12 11 11 Wind Speed (m/s) 2 1 2 Wind Direction: Southerly South Westerly South Westerly Precipitation (mm): 0.0 0.0 0.0 Tonal Noise Assessment Daytime: Run 1: None Run 2: None Run 3: None Evening: Run 1: None - - Night Time: Run 1: None Run 2: None - Compliance Status this is not a noise sensitive location Page 10 Report Number: 3350-16-04 Version 1
Noise Monitoring Location: NM3(Boundary Monitoring location) 10-08-2016 Measured Noise Levels (db re. 2 x 10-5 Pa) Comments Period: Time LAeq LAFMAX LA90 11:58 50 80 47 Daytime: 12:28 57 72 49 12:58 53 82 49 Arithmetic Average (db): 53 78 48 Daytime Criterion, db LAr,T: - - - Evening: 22:18 48 76 43 Arithmetic Average (db): 48 76 43 Evening Criterion, db LAr,T: - - - 23:00 48 86 41 Night Time: 23:30 49 70 47 Arithmetic Average (db): 49 78 44 Night time Criterion, db LAr,T: - - - Weather Conditions: The most prevalent noise noted was from the main processing plant followed by the drying plant operating. Onsite traffic including lorries, wheeled loaders and forklifts was also noteworthy. Other noise included construction work from a neighbour facility and traffic noise in the distance, Loaders were operating in the storage yard. There was operational noise from the main processing plant and traffic noise from the M7 motorway in the distance. Noise during the night time survey included distant traffic noise from the M7 motorway and operational noise from the main processing plant. A light breeze could be heard intermittently. Daytime: Evening: Night Time: Temperature ( O C) 12 11 11 Wind Speed (m/s) 2 1 2 Wind Direction: Southerly South Westerly South Westerly Precipitation (mm): 0.0 0.0 0.0 Tonal Noise Assessment Daytime: Run 1: None Run 2: None Run 3: None Evening: Run 1: None - - Night Time: Run 1: None Run 2: None - Compliance Status this is not a noise sensitive location Page 11 Report Number: 3350-16-04 Version 1
6.0 Conclusions Four locations were monitored for broadband and 1/3 rd Octave frequency as part of this annual environmental noise survey at Limited. Each point was monitored for three 30 minute periods during the day time survey, one 30 minute period during the evening time survey and two 15 minute periods during the night time survey. The findings of the survey would indicate that the noise sensitive locations were not significantly affected or impacted by sources of noise at Limited. All the boundary noise locations (NM1, NM2 & NM3) had elevated Leq noise levels due to their proximity to the main site activities and the increased sound intensity emanating from traffic on M7 motorway and a local access route. However, these boundary monitoring points are not noise sensitive receptors. NSL1, a noise sensitive location, was determined to be in full compliance with the requirements of the site s EPA issued waste license. There was no tonal noise determined at any monitoring location; therefore there are no requirements to apply penalties to the broadband measurement. Page 12 Report Number: 3350-16-04 Version 1
Appendix I Graphical Display of Raw Data Tonal Noise: The appropriate level differences vary with frequency. They should be greater than or equal to the following values in both adjacent one third octave bands: 15dB in low frequency one third octave bands (25Hz to 125Hz); 8dB in middle frequency bands (160Hz to 400Hz), and; 5dB in high frequency bands (500Hz to 10,000Hz) This is the definition outlined by the EPA in the guidance note issued in 2012: NG4. Page 13 Report Number: 3350-16-04 Version 1
Page 14 Report Number: 3350-16-04 Version 1
Page 15 Report Number: 3350-16-04 Version 1
Page 16 Report Number: 3350-16-04 Version 1
Page 17 Report Number: 3350-16-04 Version 1
Page 18 Report Number: 3350-16-04 Version 1
Page 19 Report Number: 3350-16-04 Version 1
Page 20 Report Number: 3350-16-04 Version 1
Page 21 Report Number: 3350-16-04 Version 1
Page 22 Report Number: 3350-16-04 Version 1
Page 23 Report Number: 3350-16-04 Version 1
Page 24 Report Number: 3350-16-04 Version 1
Page 25 Report Number: 3350-16-04 Version 1
Appendix II Site Map Page 26 Report Number: 3350-16-04 Version 1
Page 27 Report Number: 3350-16-04 Version 1
Appendix III Calibration Certificates Page 28 Report Number: 3350-16-04 Version 1
Page 29 Report Number: 3350-16-04 Version 1
Page 30 Report Number: 3350-16-04 Version 1
Page 31 Report Number: 3350-16-04 Version 1
Page 32 Report Number: 3350-16-04 Version 1
Page 33 Report Number: 3350-16-04 Version 1
Page 34 Report Number: 3350-16-04 Version 1
Page 35 Report Number: 3350-16-04 Version 1
Page 36 Report Number: 3350-16-04 Version 1
Page 37 Report Number: 3350-16-04 Version 1
Page 38 Report Number: 3350-16-04 Version 1
Glossary of Terms Note: Not all terms were used in the description of noise for this noise survey. Ambient noise The totally encompassing sound in a given situation at a given time, usually composed of sound from many sources, near and far. Page 39 Report Number: 3350-16-04 Version 1
Acoustic shadow Background noise Broadband Competent person Criterion noise level db Facade level Free field Hertz (Hz) Impulsive LAeq,T LAFN LAr,T LAF10 LAF90 An acoustic shadow is an area through which sound waves fail to propagate, due to topographical obstructions or disruption of the waves via phenomena such as wind currents. The steady existing noise level present without contribution from any intermittent sources. The A weighted sound pressure level of the residual noise at the assessment position that is exceeded for 90 per cent of a given time interval, T (LAF90,T). Sounds that contain energy distributed across a wide range of frequencies. Individual possessing a combination of technical knowledge, experience and skills as outlined in Section 2.0 and who can demonstrate both practical and theoretical competence. The long term mean value of the noise level that must not be exceeded. This is generally stipulated in the IPPC/Waste licence and it may be applied to a noise source, a boundary of the activity or to an NSL in the vicinity of the site. Decibel. The scale in which sound pressure level is expressed. It is defined as 20 times the logarithm of the ratio between the RMS pressure of the sound field and the reference pressure of 20 micro pascals (20 upa). The noise level at a location 1m from the facade of a building is described by the term facade level, and is subject to a higher noise level than one in an open area (free-field conditions) due to reflection effects. These are conditions in which the radiation from sound sources is unaffected by the presence of any reflecting boundaries or the source itself. In practice, it is a field in which the effects of the boundaries are negligible over the frequency range of interest. In environmental noise, true free-field measurement conditions are seldom achieved and generally the microphone will be positioned at a height between 1.2 and 1.5 metres above ground level. To minimise the influence of reflections, measurements are generally made at least 3.5 metres from any reflecting surface other than the ground. The unit of sound frequency in cycles per second. A noise that is of short duration (typically less than one second), the sound pressure level of which is significantly higher than the background. This is the equivalent continuous sound level. It is a type of average and is used to describe a fluctuating noise in terms of a single noise level over the sample period (T).The closer the LAeq value is to either the LAF10 or LAF90 value indicates the relative impact of the intermittent sources and their contribution. The relative spread between the values determines the impact of intermittent sources, such as traffic, on the background. The A-weighted noise level exceeded for N% of the sampling internal. Measured using the Fast time weighting. The Rated Noise Level, equal to the LAeq during a specified time interval (T), plus specified adjustments for tonal character and/or impulsiveness of the sound. Refers to those A-weighted noise levels in the top 10 percentile of the sampling interval; it is the level which is exceeded for 10% of the measurement period. It is used to determine the intermittent high noise level features of locally generated noise and usually gives an indicator of the level of road traffic. Measured using the Fast time weighting. Refers to those A-weighted noise levels in the lower 90 percentile of the sampling interval; it is the level which is exceeded for 90% of the measurement period. It will Page 40 Report Number: 3350-16-04 Version 1
therefore exclude the intermittent features of traffic and is used to describe a background level. Measured using the Fast time weighting. LAFmax The maximum RMS A-weighted sound pressure level occurring within a specified time period. Measured using the Fast time weighting. LAFmin The minimum RMS A-weighted sound pressure level occurring within a specified time period. Measured using the Fast time weighting. Lden Is the 24 hour noise rating level determined by the averaging of the Lday with the Levening plus a 5 db penalty and the Lnight plus a 10 db penalty. Low background noise An area of low background noise is one where the existing background noise levels measured during an environmental noise survey are as follows: o Average Daytime Background Noise Level 40dB LAF90, and; o Average Evening Background Noise Level 35dB LAF90, and; o Average Night-time Background Noise Level 30dB LAF90. Low frequency noise LFN - noise which is dominated by frequency components towards the lower end of the frequency spectrum; see Appendix VI for a more detailed discussion. LpA (db) Noise An A-weighted decibel K a measure of the overall level of soundacross the audible frequency range (20Hz 20kHz) with A-frequency weighting (i.e. A weighting ) to compensate for the varying sensitivity of the human ear to sound at different frequencies. Any sound, that has the potential to cause disturbance, discomfort or psychological stress to a person exposed to it, or any sound that could cause actual physiological harm to a person exposed to it, or physical damage to any structure exposed to it, is known as noise. Noise sensitive location NSL any dwelling house, hotel or hostel, health building, educational establishment, place of worship or entertainment, or any other facility or other area of high amenity which for its proper enjoyment requires the absence of noise at nuisance levels. Octave band A frequency interval, the upper limit of which is twice that of the lower limit. For example, the 1,000Hz octave band contains acoustical energy between 707Hz and 1,414Hz. The centre frequencies used for the designation of octave bands are defined in ISO and ANSI standards. Rating level See LAr,T. RMS The RMS (Root Mean Square) value of a set of numbers is the square root of the average of their squares. SEL (LAX or LAE) Sound exposure level a measure of the A-weighted sound energy used to describe noise events such as the passing of a train or aircraft; it is the A-weighted sound pressure level if occurring over a period of 1 second, would contain the same amount of A-weighted sound energy as the event. Sound pressure level Sound pressure refers to the fluctuations in air pressure caused by the passage of a sound wave. It may be expressed in terms of sound pressure level at a point. Specific noise level A component of the ambient noise which can be specifically identified by acoustical means and may be associated with a specific source. In BS 4142, there is a more precise definition as follows: the equivalent continuous A-weighted sound pressure level at the assessment position produced by the specific noise source over a given reference time interval (LAeq, T). Page 41 Report Number: 3350-16-04 Version 1
Time weighting Tonal One of the averaging times (Fast, Slow or Impulse) used for the measurement of RMS sound pressure level in sound level meters. Sounds which cover a range of only a few Hz which contains a clearly audible tone, i.e. distinguishable, discrete or continuous noise (whine, hiss, screech, or hum etc.) are referred to as being tonal. 1/3 octave analysis Frequency analysis of sound such that the frequency spectrum issubdivided into bands of one third of an octave each. Page 42 Report Number: 3350-16-04 Version 1