The Sound Level Meter is a hand-held, stand-alone portable instrument for the measurement and analysis of sound pressure level emitted by stationary vehicles at a nominated engine speed. Input parameters include engine type (no of strokes) and no of cylinders. These can be pre-programmed for 2 or 4 stroke and 1 to 8 cylinders
Features
- The AutoTest® eNoise is a hand-held, stand-alone portable instrument for the measurement and analysis of sound pressure level emitted by stationary vehicles at a nominated engine speed.
- A uniform approach ensures that vehicle owners will get an accurate assessment of whether their vehicle complies with national noise standards.
- This noise emission standard for motor vehicles adopts the UN Economic Commission for Europe (UNECE) Regulations for motor vehicle noise.
- The Stationary Exhaust Noise Test Procedures for In-Service Motor Vehicles was first prepared by the Motor Vehicle Environment Committee (MVEC, the precursor to LTEC) in 1999 to introduce a national approach to measuring exhaust noise. Previous to this, some jurisdictions had developed their own approaches and the differences in these approaches could have led to inconsistencies in test results.
- The UNECE regulations refer to ISO 5130 “Acoustics – Measurement of Sound Pressure Levels Emitted by Stationary Road Vehicles” which provide the noise testing procedures for in-service vehicles.
Aplication
- The Stationary Exhaust Noise Test Procedures for In-Service Motor Vehicles was fi rst prepared by the Motor Vehicle Environment Committee (MVEC, the precursor to LTEC) in 1999 to introduce a national approach to measuring exhaust noise.
- Previous to this, some jurisdictions had developed their own approaches and the differences in these approaches could have led to inconsistencies in test results. A uniform approach ensures that vehicle owners will get an accurate assessment of whether their vehicle complies with national noise standards
- This noise emission standard for motor vehicles adopts the UN Economic Commission for Europe (UNECE) Regulations for motor vehicle noise. The UNECE regulations refer to ISO 5130 “Acoustics - Measurement of Sound Pressure Levels Emitted by Stationary Road Vehicles” which provide the noise testing procedures for in-service vehicles
Specification
Applicable Standards
- Class
- Class 1 : International Electrotechnical Commission Publication IEC 61672-1 Ed. 1.0 (Billingual 2002): Electroacoustics - Sound level meters - Part 1: Specifi cations
- Calss 1: Australian Standard AS IEC 61672.1-2004: Electro acoustics - Sound level meters - Specifications
- Type
- Type 1: International Electrotechnical Commission Publication IEC 60654 (1979) “Precision sound level meters”
- Type 1: Australian Standard AS 1259.1-1990 “Acoustics - Sound level meters - Part 1: Non-integrating”
| No | Desciption | Tech data |
|---|---|---|
| 1 | Measured Parameter | Sound pressure |
| 2 | Frequency Range | 63Hz to 10kHz |
| 3 | Dynamic Range | 80dB |
| 4 | Max Sound Pressure Level | 120dB |
| 5 | Level Ranges | 60 - 100dB, 70 - 110dB, 80 - 120dB |
| 6 | Frequency Weighting | A |
| 7 | Measurement Time | 1.0s in SPL Test / 1.5s in Engine Speed Test |
| 8 | Displayed Parameters | SPL / RPM |
| 9 | Input Parameters Required | No. cylinder, No. stroke |
| 10 | Power Supply | Rechargeable battery pack (automatic power off below 10%) “Battery Flat” displayed |
| 11 | Operating time | 9 hours continuous |
| 12 | Microphone | 7.5mm electret, frequency range 20Hz - 20kHz |
| 13 | Display | 240 x 160 pixel full graphics display |
| 14 | Keypad | 40 keys alphanumeric tactile membrane keypad |
| 15 | Weight | 0.4kg |
| 16 | Physical Dimensions | 230 x 95 x 50mm |
| 17 | Temp/Humidity Range | 0° - 60°C / 20% - 90% |