Training | Resources

arrow_back_ios

Main Menu

arrow_back_ios

Main Menu

See All Acoustic End-of-Line Test Systems See All DAQ and instruments See All Electroacoustics See All Software See All Transducers See All Vibration Testing Equipment See All Academy See All Resource Center See All Applications See All Industries See All Insights See All Services See All Support See All Our Business See All Our History See All Our Sustainability Commitment See All Global Presence
arrow_back_ios

Main Menu

See All Actuators See All Combustion Engines See All Durability See All eDrive See All Production Testing Sensors See All Transmission & Gearboxes See All Turbo Charger See All DAQ Systems See All High Precision and Calibration Systems See All Industrial electronics See All Power Analyser See All S&V Hand-held devices See All S&V Signal conditioner See All Test Solutions See All DAQ Software See All Drivers & API See All nCode - Durability and Fatigue Analysis See All ReliaSoft - Reliability Analysis and Management See All Test Data Management See All Utility See All Vibration Control See All Acoustic See All Current / voltage See All Displacement See All Load Cells See All Pressure See All Strain Gauges See All Torque See All Vibration See All LDS Shaker Systems See All Power Amplifiers See All Vibration Controllers See All Accessories for Vibration Testing Equipment See All Training Courses See All Whitepapers See All Acoustics See All Asset & Process Monitoring See All Custom Sensors See All Data Acquisition & Analysis See All Durability & Fatigue See All Electric Power Testing See All NVH See All Reliability See All Smart Sensors See All Vibration See All Weighing See All Automotive & Ground Transportation See All Calibration See All Installation, Maintenance & Repair See All Support Brüel & Kjær See All Release Notes See All Compliance See All Our People
arrow_back_ios

Main Menu

See All CANHEAD See All GenHS See All LAN-XI See All MGCplus See All Optical Interrogators See All QuantumX See All SomatXR See All Accessories See All Accessories See All BK Connect / Pulse See All API See All Microphone Sets See All Microphone Cartridges See All Acoustic Calibrators See All Special Microphones See All Microphone Pre-amplifiers See All Sound Sources See All Accessories for acoustic transducers See All Experimental testing See All Transducer Manufacturing (OEM) See All Accessories See All Non-rotating (calibration) See All Rotating See All CCLD (IEPE) accelerometers See All Charge Accelerometers See All Impulse hammers / impedance heads See All Cables See All Accessories See All Electroacoustics See All Noise Source Identification See All Environmental Noise See All Sound Power and Sound Pressure See All Noise Certification See All Industrial Process Control See All Structural Health Monitoring See All Electrical Devices Testing See All Electrical Systems Testing See All Grid Testing See All High-Voltage Testing See All Vibration Testing with Electrodynamic Shakers See All Structural Dynamics See All Machine Analysis and Diagnostics See All Calibration Services for Transducers See All Calibration Services for Handheld Instruments See All Calibration Services for Instruments & DAQ See All On-Site Calibration See All Resources See All Software License Management

Manually Scanned Measurements


...with Building Acoustics Partner comfortably reduces total survey time

HBK 2255 SLM device

Manually-scanned level measurements are becoming increasingly popular for level measurements in field sound insulation surveys. Compared to measurements at fixed microphone positions, manually-scanning reduces the number of separate microphone positions required for a sound insulation survey and typically reduces the total survey time. It also eliminates the need to carry a tripod for the sound level meter. There is even evidence that manually-scanned measurements are more repeatable than measurements at fixed positions*, particularly at low frequencies. 

Manually-scanned level measurements are explicitly supported in the ISO 16283 series of standards for field measurement of sound insulation in buildings, with specific requirements separate to those for fixed point and mechanically moved microphones. HBK 2255 and Building Acoustics Partner are optimized for manually-scanned measurements, meeting the requirements of ISO 16283 with maximum convenience and efficiency.

Manual Scanning Building Acoustics with HBK SLM 2255

Manually-scanned measurements are made by moving the microphone through a predefined path with an outstretched arm. Each scan must be performed slowly and smoothly over a period of 30 seconds or more. For a typical airborne sound insulation test, a total of five scans are required: one for each source position in both the source and receiving rooms, plus one more for background noise in the receiving room. For a building survey covering 15 partitions, this adds up to more than half an hour of cumulative scanning time, slowly moving the sound level meter with an outstretched arm. Clearly, a lightweight sound level meter is desirable for this task. And at just 400 grams, HBK 2255 is one of the lightest sound level meters on the market, and more than 35% lighter than Type 2250.

HBK 2255 has another trick up its sleeve for manually-scanned measurements. ISO 16283 defines three scanning paths for use in normal rooms: circle, helix and cylindrical. Both the circle and helix paths require the user to adjust their body position partway through the scan, and the standard recommends that the user pauses measurement while repositioning to minimize operator noise.
No such repositioning is necessary for the cylindrical scan, but the standard requires the use of an extension rod to hold the microphone. With HBK 2255’s rigid microphone extension rod,
this requirement is met while keeping the sound level meter and microphone in one hand with easy access to the measurement control buttons.

HBK 2255 manual measurement drawing
 

Our Building Acoustics Partner app is also optimized for manually-scanned measurements.
When manually-scanned measurements are chosen in the project setup, the default number of measurement positions is adjusted to match, and the measurement time is switched from a preset duration to a free run, allowing you to stop the measurement when you’ve finished scanning, instead of the other way around. The app also has a ‘pocket mode’, allowing you to perform manual scanning measurements using HBK 2255’s interface, while still receiving workflow guidance pushed from the app to the sound level meter’s display. Every level measurement also includes a logging profile, allowing you to see how the level changes with time during your scan, helping you to spot any operator noise and refine your scanning technique.

For these reasons and more, we believe that HBK 2255 with Building Acoustics Partner is the best sound level meter in the world for manually-scanned building acoustics measurements.

 

* An empirical study of the effects of occupied test rooms and a moving microphone when measuring Airborne Sound Insulation

Modern Slavery Statement     Imprint    Cookie Policy    Privacy Policy    Sitemap    Ethical Business

 

 

© 2024 Hottinger Brüel & Kjær

 

 

close
nCode logo
Graphics Brand

We have moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.

close
ReliaSoft-Logo-webp
Graphics Brand

We have moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.

close
Prenscia HBM-Logo rgb
Graphics Brand

We have moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.

close
HBM-Logo blue rgb
Graphics Brand

We have moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.

close
logo of Brüel & Kjær (BKSV), experts of sound and vibration measurements from HBK
Graphics Brand

We have moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.