• Alightweight, rugged and hand-held analyser with 80 or 120dB dynamic range, single or dual channel capability, built-in hard disk and PC-card slot. Displays and menus can be set in several languages. • With the Nor121 you can measure and record more than 1300 functions and parameters - there is a function for every need! • For the environmental noise detection, the Nor121 fits in everywhere! Semi-permanent noise monitoring, permanent noise monitoring or just regular measurements there and then - with or without frequency analysis, annoyance recorder function, pure tone detection and determination, you name it. • Sound reduction and reverberation time - in two channels! The Nor121 makes any building acoustic field measurement without the need for a PC. • As for all Norsonic analysers, many of the features in the Nor121 are optional and can be added upon order or as retrofit whenever required. In this way you don't pay for features never used. • The Nor121 can be what you want it to be for you, with its multitude of possibilities combined with the ability to create userdefined setups. Made to measure - by you! PD 121 Ed.2 Rev.0 English 08.03 The Nor121 Analyser - for any Environmental or Building Acoustic measurement Product Data

Building Acoustic mode • Single or dual channel capabilities • Reverberation time measurements using triangle or least-square-fit methods • Internal rating calculations for airborne and impact sound insulations • Built-in noise generator with white, pink and 1/1 - 1/3 octaveband filtered noise • Serial frequency scanning • Background noise corrections • Microphone corrections • The Nor121 may optionally form the measurement part of a wireless building acoustic system (Nor1516) • Internal hard disk and standard PC card for the storage of data • Results can be exported via the PC slot, RS-232 serial...

The Nor121 is designed to be a two-channel analyser when working in building acoustics mode, but it works well as a single channel analyser too. If you already own a Nor121 and want to upgrade it to include the building acoustics extension, the second channel may be installed during the upgrade process - or later, if that is more suitable. Built-in Noise Generator The building acoustics mode features a built-in noise generator with white and pink broadband noise. Sometimes, however, this is not enough. From time to time you will come across measurement sessions where you simply cannot get enough...

Although the Nor121 often will play the role of a data acquisition unit, it is important to be able to verify the measurements while you're still on-site. Therefore the Nor121 also calculates the R'w, L'n,w etc. for you. The results are shown in the display - you won't need a separate computer for this. Any retakes can then be made there and then. Time and money saved again! A Self-contained Solution If you order, or later upgrade your Nor121, to have two fully operating channels, all the building acoustics measurements are made dual channel. However, you may run the system as a single channel...

Environmental mode • Records the sound signal itself • Parallel measurement reports with six levels of nesting each having individual time settings plus profile and event based data • Real time frequency analysis in octave and third octave bands (0.1-20 000 Hz in single channel mode, 6.3-5 000 Hz in dual channel mode) • Statistical LN calculations including percentile spectra • Measures all time constants and the A, C and Linear weightings simultaneously • Optional 120dB dynamic range avoids the need for range setting • Pure tone detection mode • Full size graphics display with backlight • Advanced...

The Nor121 is report oriented This means that it has been designed to provide you with reports on the environmental noise level rather than being just another sophisticated sound level meter. In environmental mode, the Nor121 can measure the following parallel reports: The Time Profile Report The (time) profile is the basis of any Nor-121 measurement. The Profile time resolution can be set from 10ms to a hundred hours, with a step size of 5ms for resolution settings below 1s. For resolution settings of 1s and above the step size is 1s. Profile lets you log a multitude of functions as they vary...

Statistics can be presented in several ways - as statistical and cumulative distribution, but also as percentiles. There are 8 percentile settings available, selectable within the range L0.1 to L99. However, since the cumulative distribution forms the basis for the percentiles this graph can be used to find any percentile. To add flexibility, you may set up the instrument to log a percentile as a function of time or frequency. Which percentile is, of course, entirely determined by you. To avoid getting totally lost when the degrees of freedom are so numerous, a set of predefined setups is available....

Timer The Nor121 has a built-in timer to enable delayed start and to enable that measurements shall take place in certain parts of the day/week etc. In this way the Nor121 may restrict its monitoring activities to take place only during business hours etc. Source coding, adding markers to the measurement While measuring with the Nor121 you may tag or code sources as they happen. A one-digit code (0-9) can be keyed in to later serve as an identification of the type of noise. This can also be referred to as adding a marker to the measurement. The source codes are therefore called markers in the...

PD 121 Ed.2 Rev.0 English 08.03 9 Noise from the factory again... or was it a dog this time? The Nor121 is a powerful environmental noise monitoring device. The vast number of functions it can be set up to measure is one side of it, but just as important is the sophisticated event handling system and the built-in timer function. For the Nor121 an event is a significant change in the sound level for more than a minimum period of time. The amount of level change required is predefined by you. Whenever an event occurs the instrument will log certain user-defined functions with a higher time resolution...