PicoDiagnostics NVH kits

Pico's products for Noise, Vibration and Harshness (NVH) testing give technicians the ability to identify and diagnose unwanted vibration and noise sources in a vehicle.

NVH - Noise Vibration Harshness problems

Car displaying Noise, vibration and harshness within the vehicle

NVH problems

The root of all NVH problems is a vibration. In some cases, these are unwanted or unexpected vibrations, and in other cases, they are normal and always present (e.g. engine combustion), but they are noticeably disturbing when transmitted to the passenger compartment. 

Sound is simply a vibration that is transmitted through the air (or another medium) and is heard when it reaches a person's ear. Although the perfect hearing range is 20 Hz to 20 kHz, most of us are more like 100 Hz to 15 kHz at best. Vibrations are usually felt at frequencies below 200 Hz, and in the overlapping frequency, range vibrations can be both felt and heard.

In order to deal with this frequency range effectively, our PicoDiagnostics NVH kits contain both microphones (for sound), and accelerometers (for vibrations). 

Traditionally, NVH problems have been viewed as difficult to solve, with NVH complaints being subjective as people have different levels of NVH acceptance or feeling. A technician needs the right tools and procedures to be able to tackle these issues effectively, to diagnose complaints in an objective, repeatable and easy manner. The PicoDiagnostics NVH kits do this, while also generating customer reports to show that an improvement has been made against the customer’s complaint.

Kit contents

Although the NVH kits are available in different configurations, they differ only in the number of parts supplied. In each case, a BNC cable connects the interface box to your Automotive PicoScope and a USB cable connects your PicoScope to the PC or laptop on which you run the PicoDiagnostics software. A separate J2534 Scan tool (see below) or VCI (not supplied) can be used to provide RPM data or an electrical signal that can be used for RPM.

Starter, Standard or Advanced

The Starter NVH Kit will allow you to measure vibrations on 3 axes, (X, Y and Z). The Standard NVH Kit gives you the option to also measure vibration or sound on a single axis at an additional location on the vehicle. The Advanced Kit gives you the option to measure vibration or sound at four different locations on the vehicle. The Starter to Standard Upgrade Kit gives you an extra set of all the kit items.

All kits are available in a carry case or foam tray. The foam trays enable users to store their NVH Diagnostics kits safely in a tool chest of their own choosing.

NVH kit NVH interface Accelerometer Magnet Microphone Extension cable Picoscope 4425
Starter NVH Kit 1 1 1 1 1 -
Standard NVH Kit

2

2 2 2 2 -
Advanced NVH Kit 4 4 4 4 4 -
Starter to standard upgrade kit 1 1 1 1 1 -
Upgrade to equivalent Starter, Standard or Advanced Essentials kit - - - - - +1

NVH Essentials kits

If you want to use a Pico NVH kit but do not own a PicoScope already, you can now purchase an NVH Essentials kit. These are the equivalent to the basic NVH kits but with an automotive PicoScope included.

Accessories

Mongoose Pro ISO/CAN J2534 lead (TA293)

Having used the Mongoose Pro alongside Pico products for some time, we are confident it is the best and most reliable product to use with our NVH kit for the acquisition of a road speed signal.

Optical balancing kit (PP991)

The purchase of our Optical Balancing kit allows on-vehicle balancing in order to rectify first order shaft vibrations. Included as part of our PicoDiagnostics software, the Propshaft balancing test provides clear advice and guides you through analysis and test procedures:

• Support for pinion flange, single weight, and hose clamp balancing weights

• Step-by-step procedures with help and graphical displays

NVH Assist screenshot

Setup wizard and software help

The Pico NVH test has a set of wizards to guide you through the necessary connections and the vehicle data that will generate information and results in a format that is easy to understand.

The system detects vibrations (and sounds) that change (wheel, engine, propshaft etc.) but also fixed frequency vibrations (e.g. electric cooling fan). Results are displayed in a report that is easy to understand and can be viewed in the way that suits you.

Comprehensive help files explain likely causes and solutions, and the functions provided by the software make it easy to diagnose the problems in a logical way to reveal the root cause. The same system will also give you the ability to measure the
effectiveness of any repairs or modifications and demonstrate the
results to the customer.