Noise Investigation Report Mandarin Takeaway

Noise Investigation Report January 2006

Mechanical Ventilation System @ The Mandarin Takeaway, 26 Church Road, Port Erin

A black and white photograph showing a large metal flue pipe lying on the ground in the foreground with a building and hills in the background.

For: Planning By: Environmental Protection Unit

Prepared by: Simon Renton MSc, AMIOA Environmental Protection Officer

Environmental Protection Unit Department of Local Government & the Environment Murray House Mount Havelock Douglas

Tel: (01624) 685892 Issue: 1 Issue Date: 27 February, 2006

Index

Section	Subject	Page
1.	SUMMARY	3
1.1	Rowdy Behaviour	3
1.2	Fan Noise	3
Chart 1	– Northview Internal Noise Measurements	3
2.	RECOMMENDATIONS	4
3.	INSTRUMENTATION	5
4.	NOISE MONITORING RESULTS	6
4.1	Rowdy Behaviour	6
Chart 2	- Inside Northview 21 January 2006	6
Chart 3	- Inside Northview 22 January 2006	7
4.2	Fan Noise	8
Chart 4	- Time History of Measurements inside Northview 16 September 2005	8
Chart 5	- Time History of Measurements inside Northview 21 February 2006	8
Chart 6	- Time History of Measurements inside Northview 22 February 2006	9
5.	References	9
Appendix
1	Northview Residents’ Noise Investigation Record Sheets	10
2	B&K Measurement Data 21 & 22 Feb 06	11

1. Summary

1.1 Rowdy Behaviour

During the period 13 Jan 06 – 31 Jan 06 the residents of Northview were able to produce records and monitoring (from a Matron tape recording system provided to them by the EPU) of only two incidents of alleged noise nuisance from rowdy behaviour lasting for less than 5 minutes each. Although maximum noise levels were sufficiently loud to cause sleep disturbance the frequency and duration of these events are insufficient for the EPU to consider this noise as likely to constitute a statutory noise nuisance from this evidence.

1.2 Fan Noise

The residents of Northview did not indicate on their record sheets that noise from the fans continued to be a nuisance to them and indeed analysis of noise monitoring indicates that the level of noise from the fan was below the EPU's recommended noise limit criteria.

Chart 1 – Northview Internal Noise Measurements

Frequency 1/3 Octaves & Broadband A-weighted

NLC – recommended Noise Limit Criteria

To prevent noise nuisance from low frequency noise the following criteria are recommended in accordance with research recently commissioned by DEFRA in the UK:

2. Recommendations

If it were determined that planning permission was required the following condition is recommended with the objectives:

i. Broadband noise from the ventilation system is no louder than the existing background noise levels. ii. Any audible low frequency tonal noise is below the low frequency noise disturbance criteria as currently proposed by the Department of Environment, Food and Rural Affairs (DEFRA).

Recommended Noise Conditions

The broadband level of the noise emitted from the mechanical ventilation system at the Mandarin Takeaway shall not exceed LAeq, 1 hour - 30 dB daytime (0700 - 2300) and LAeq, 5 minute - 25 dB night-time (2300 - 0700). This shall be measured inside any adjacent residential premises.
Low frequency audible tonal noise emitted from the mechanical ventilation system at the Mandarin Takeaway shall not exceed the following criteria measured inside any adjacent residential premises:

2.1 Between the hours of 2300 - 0700 hrs measured as 1/3 octave Lleq, 5 min²

Table 1 – Recommended Low Frequency Noise Limit Criteria
Frequency Hz	16	20	25	31.5	40	50	63	80	100	125	160
Night-time dB	83	74	64	56	49	43	42	40	38	36	34
Day time dB	88	79	69	61	54	48	47	45	43	41	39

2.2 Between the hours of 0700 - 2300 hrs measured as 1/3 octave Lleq, 1 hour²

Hz	16	20	25	31.5	40	50	63	80	100	125	160
dB	83	74	64	56	49	43	42	40	38	36	34

Hz	16	20	25	31.5	40	50	63	80	100	125	160
dB	88	79	69	61	54	48	47	45	43	41	39

3. Instrumentation

Sony Digital Audio Tape-recorder TCD-D100

Serial No: 539320

There was no significant drift (less than 0.1 dB) in the calibration tone between the beginning and end of DAT tape recording. {{table:284499}} CAF – Accredited Calibration 20 September 2005 The sound level meter complies with the IEC 1672 Class 1 standard. {{table:284500}} There was no significant drift in calibration before and after noise measurements were taken.

4. Noise Monitoring Results

File 1_060121_001215.CMG
Location	North View
Weighting	A
Data type	Leq
Start	21/01/06	00:14:15:000
End	21/01/06	00:20:51:820
Source	Leq specific dB	Lmin dB	Lmax dB	Duration cumulated h:m:s:ms
Rowdy Voices	38.4	25.4	61.4	00:02:15:600
Residual	32.1	24.9	57.1	00:04:21:220
Overall	35.4	24.9	61.4	00:06:36:820

4.1 Rowdy Behaviour

Chart 2 - Inside Northview 21 January 2006

Chart 3 - Inside Northview 22 January 2006

File 1_060122_020300.CMG
Location	North View
Weighting	A
Data type	Leq
Start	22/01/06	02:03:00:000
End	22/01/06	02:05:48:600
Source	Leq specific dB	Lmin dB	Lmax dB	Duration cumulated h:m:s:ms
Rowdy Voices	36.4	20.6	66.0	00:00:43:400
Residual	32.6	20.6	60.3	00:02:05:200
Overall	33.9	20.6	66.0	00:02:48:600

4.2 Fan Noise

Northview Fast 300ms A	SFR 1609/05 15h28m48s000	35.0dB	FRI 1609/05 15h48m11s500	29.6dB
Northview 1/3 Oct 20Hr 300ms	FRI 1609/05 15h28m48s000	64.8dB	FRI 1609/05 15h48m11s500	45.2dB
Northview 1/3 Oct 100Hr 300ms	FRI 1609/05 15h28m48s000	45.0dB	FRI 1609/05 15h48m11s500	36.6dB

Chart 4 - Time History of Measurements inside Northview 16 September 2005

Chart 5 - Time History of Measurements inside Northview 21 February 2006 {{image:550360}}

Chart 6 - Time History of Measurements inside Northview 22 February 2006

N.B. 25 dB Background Noise + 25 dB Fan Noise = 28 dB Total 38.3 dB - 19.1 dB A-weighted correction @ 100 Hz 1/3 Octave = 19.2 dB(A) Hence noise from fan is less than 25 dB(A) Broadband.

5. References

Noise Investigation Report 21 September 05 by Simon Renton EPU.

Frequency Hz	20 Hz 1/3 Octave	100 Hz 1/3 Octave	Broadband A-Weighted
Recommended Noise Limit Criteria dB	74	38	25
Measured Noise Level Overall dB 21/01/06	41.7	38.3	28.9
Measured Noise Level Overall dB 22/01/06	34.4	31.4	27.8

Department Of Local Government And The Environment

Date	Time Started/ Finished	Description of Noise (e.g. heat, bang, adams, thump, mouse, singing, etc.; loud, fairly loud etc.)	Level of Disturbance (e.g. wake me up, interfered with conversation, had to turn TV up etc.)	Believed Source of Noise/ Additional Remarks
20/1/06	00.15 00.20	Two Main Cat and Vowels	woke me up	Cues and People
22/1/06	02.05 02.10	Vowels		People





On completion please forward completed sheet(s) to: Environmental Protection Unit of Local Government and the Environment, Murray House, Mount Havelock, Douglas, Isle of Man, NH 25F.	The above is a true and accurate account of events: Signed: ______________________ Date: _____________

Environment, Safety And Health Directorate

Noise Investigation Diary Sheet

ADDRESS OF YOUR PREMISES: North View Church Hall Post Eau

NAME OF OCCUPIER:

Appendix 2 - B&K Measurement Data 21 & 22 Feb 06

21/01/06 - B&K 2238 Leq 5 minute Data

22/01/06 - B&K 2238 Leq 5 minute Data

Noise Investigation Report Mandarin Takeaway

Source & Provenance