Products and Equipment from Larson Davis, a division of PCB Piezotronics on Environmental XPRT

The Larson Davis - Rapid Deployment Noise Monitoring System

NoiseTutor: Continuous monitoring of environmental data in remote areas has always presented a unique set of challenges. Typical solutions involve complex installations, frequent visits to remote locations to keep the system fully operational and require expert level attention to retrieve and share data amongst customers, consultants and project leads.

Model 381-NMS - Permanent Noise Monitoring System

An Integrated Hardware & Software System with Digital Communication and an Open Interface for Long Term Noise Monitoring Applications. The Model 831-NMS permanent noise monitoring system is designed for long term monitoring around airports, industrial facilities, motorsport complexes, wind farms, mining operations, and within the general community. Many required accessories are integrated through the INT docking station. Two way remote...

Noise Tutor NMS Rapid Deployment Noise Monitoring System

Integrated Internet Solution for Remote Noise Monitoring. Continuous monitoring of environmental data in remote areas has always presented a unique set of challenges. Typical solutions involve complex installations, frequent visits to remote locations to keep the system fully operational and require expert level attention to retrieve and share data amongst customers, consultants and project leads.

Larson Davis - Model 831 - Sound Level Meter

Larson Davis Model 831 Class 1 Sound Level Meter. This versatile instrument, with high definition display, performs the functions of several instruments. It puts the combined features of a precision Class 1 sound level meter, environmental noise analyzer, personal noise dosimeter, and a real-time frequency analyzer in the palm of your hand. The Larson Davis Model 831 is a fifth generation Larson Davis sound level meter, designed for simple single...

Model SoundTrack LxT - Sound Level Meter

Over the years, various types of Sound Level and Octave Band Meters have been used by Industrial Hygienists and Safety Professionals for monitoring workplace noise most requiring significant operator training and producing varying degrees of effectiveness.

SoundExpert - Model LxT - Noise Monitoring Kit

In addition to the SoundExpert LxT meter, this kit includes the EPS042 protection case and D-cell battery pack, the EPS2108-2 microphone protection shroud, and EXC010 10 ft. cable. Using D-cell alkaline batteries, allows the noise monitor to be smaller and lighter; avoid the expense of shipping heavy lead acid batteries and the hassle of recharging. You can transport it easily to your site, deploy it, measure data, retrieve your system, download the...

SoundTrack - Model LxT N/Forcer - Sound Level Meters

A Real Breakthrough in Noise Enforcement. For Community Noise Ordinance Measurements and Nuisance Complaint Response. Portable, compact and simple to use, the Larson Davis LxT N/Forcer Sound Level Meter produces accurate, citation-ready noise data on-the-spot, with its compact portable printer.

SoundTrack - Model LxT LXT1-QPR - Firearms Acoustic Analysis

Quantitative Measurements of Sound Pressure Levels Generated by Firearms with & Without Suppression Devices. Many firearm examiners are tasked with determining whether installation of a suppressor on a firearm results in a “perceptible” reduction of the sound pressure level of a gun. The Larson Davis SoundTrack LxT provides this functionality utilizing an easy-to-use handheld platform.

Model 820 - Sound Level Meter

There exists a need to select an instrument that will do just what you need it to do. The 820 was designed with this in mind. The Model 820 is the perfect environmental noise analyzer, maintaining all of the features of the 812 but with added memory, modem capability, daily and exceedance histories.

Model 812 - Sound Level Meter

There exists a need to select an instrument that will do just what you need it to do. The 812 was designed with this in mind. For example, a consultant that works heavily in the industrial hygiene sector will greatly benefit from having the Model 812, a hand held data logging integrating sound level meter and a personal noise dosimeter.

Model System 824 - Sound Level Meter

The System 824 combines sound level meter and real-time analyzer capabilities in one small, rugged package. The instrument covers many important measuring functions in one user-friendly, hand-held design.

Model 720 - Sound Level Meter

The 720 was designed to do just what you need it to do. For example, a consultant that works heavily in the industrial hygiene sector will greatly benefit from having this hand-held data logging integrating sound level meter and, by removing the nose cone and revealing the 1 meter microphone extension cable, a personal noise dosimeter. The capability to add environmental noise monitoring to your portfolio while retaining the IH work should encourage...

Model HVM100 - The Human Vibration Monitor

The Human Vibration Monitor 100 is a hand-held instrument for measuring human exposure to vibration, performing relevant calculations and providing overall metrics on its LCD display. Detailed vibration levels are easily stored in its built-in data logger, which can hold up to 100 separate time-history test files including all required metrics. This information can then be downloaded to a PC for analysis and archiving.

Model 703 - Personal Noise Dosimeters

Spark - The Spark series are the perfect choice for personal noise exposure sampling in the workplace. Weighing only 7 ounces, they are intrinsically safe data logging dosimeters.

Model 703+ - Personal Noise Dosimeters

Spark - The Spark series are the perfect choice for personal noise exposure sampling in the workplace. Weighing only 7 ounces, they are intrinsically safe data logging dosimeters.

Model 704 - Personal Noise Dosimeters

Spark - The Spark series are the perfect choice for personal noise exposure sampling in the workplace. Weighing only 7 ounces, they are intrinsically safe data logging dosimeters.

Model 705 - Personal Noise Dosimeters

Completely sealed in an extruded metal housing, with no controls or display to tamper with or damage, the basic model Spark 705 is programmed to start automatically and gather noise exposure data unobtrusively, time after time. Capable of storing up to fifty separate tests in a memory that can never be accidentally erased - even with the battery removed - the 705 creates a concise, one-page report with all your compliance data and a clear graphical...

Model 706 - Personal Noise Dosimeters

Spark 706 is the fully-featured self-contained dosimeter that provides ease-of-use, sleek ergonomic design and full on-board data logging, along with a backlit LCD display and lockable keypad. The 706 delivers over 100 hours of continuous exposure monitoring on two standard AA Alkaline batteries and can store over 30 days of data in its huge 4MB memory. Standing up to three feet from the worker, you can instantly connect the 706RC using infrared...

Model 705+ - Personal Noise Dosimeters

Spark 705+ has all the features of the 705 PLUS the ability to be controlled, interrogated and downloaded by the 706RC Dosimeter/Remote Controller. This gives you the ultimate combination of tamper-proof wearability and affordability with on-demand display and control functionality. Standing up to three feet from the worker, you can instantly connect the 706RC using infrared remote capability to check results, view data, even stop and start a test!

Model 706RC - Personal Noise Dosimeters

Spark 706RC gives you all the great features and capabilities of the 706 AND the ability to link up with the other Spark models (except 704) for remote data viewing, dosimeter control, status updates and upload of stored test results. The 706RC not only offers a safe, comfortable distance between the user and the worker being monitored, it can store data from up to fifty other Spark series dosimeters for transport of data and download to a remote...

Model CAL150 - Precision Acoustic Calibrator

IEC 60942 Class 2 Handheld Sound Level Calibrator for ½” microphones at 1000 Hz Used for Sound Level Meters and Noise Dosimeters.

Model CAL200 - Precision Acoustic Calibrator

The Model CAL200 is a battery operated, temperature compensated precise Class 1 Sound Calibrator for use with microphones. Adaptors allow the calibrator to be used with 1/4 and 3/8' microphones. The following specifications apply: Calibration frequency = 1kHz. Output Sound Pressure Level is selectable from 94 or 114 dB re 20Pa ( 0.2dB).

Model CAL250 - Precision Acoustic Calibrator

The Model CAL250 is a battery operated, temperature compensated precise Class 1 Sound Calibrator for use with 1 microphones for the performance measurement and calibration of Sound Level Meters and Dosimeters. Adaptors allow the calibrator to be used with 1/4,1/2 and3/8 microphones. The following specifications apply: - Calibration frequency = 251.2Hz. - Output Sound Pressure Level is 114 dB re 20Pa (0.1dB).

Model CAL291 - Precision Acoustic Calibrator

The Model CAL291 is a dual channel Sound Calibrator. It is designed for measuring the residual intensity of sound intensity measurement systems. The following specifications apply: - When used with external signal generators the CAL291 Calibrator shall produce matched dual channel outputs of: ٠Sinusoids; Pink/White BB Noise. ٠1/3 Octave/White PRN.

Air Condenser Microphones

Larson Davis offers wide range of condenser microphones for precision measurements, covering the infrasonic to ultrasonic frequency range. Free-field and pressure microphones are available in 1/4-inch, 1/2-inch and 1 inch diameters for a variety of applications. The microphones are engineered to give long-term stability and durability. Resistance to humidity and temperature variations is very high. The Larson Davis microphones are the most durable...

Preamplifiers for LxT/831

The Larson Davis PRM831 is a microphone preamplifier for use with electret microphones with a Larson Davis Model 831 Sound Level Meter. The preamplifier requires very little supply current and operates over wide temperature and humidity ranges. The attenuation is minimal when operating with 50mV/Pa sensitivity microphones up to a Sound Pressure Level of 143dB peak. The preamplifier will drive 300 feet of cable with an 20kHz to a maximum amplitude of...

Permanent Outdoor Microphone & Preamplifier

The Larson Davis 426A12 Outdoor Microphone has been designed for permanent outdoor use in any weather condition. It is constructed of stainless steel to resist corrosion, and its profile minimizes both wind resistance and acoustic reflections. It includes a rain hat, wind screen and bird spikes and an electrostatic actuator which can be controlled remotely for on-site calibration checks. With the proper choice of microphone, it can provide frequency...

Microphone Adaptors

BNC to 1/4' microphone thread adaptor. Capacitance is 6.8 pf. Used to send an electrical signal into the 1/4' microphone preamp. Can also be used to check system electrical noise floor by use of included short. BNC to 1/2' microphone thread adapter. Capacitance is 18 pf. Used to send an electrical signal to a 1/2' microphone preamp. Can also be used to check system electrical noises floor by use of included dummy load - for all except 1'...

Accelerometers for HVM100

Larson Davis offers a selected range of measurement accelerometers optimized for use with the HVM100 Human Vibration Monitor. They cover the complete range of applications including Hand-arm, Whole-body, and Glove Transmissibility measurements.

Preamplifiers

Larson Davis offers a number of microphone preamplifiers for a variety of applications. Ruggedly built, they can drive lines up to 500 feet with frequency response from as low as 0.3 Hz to as high as 200 kHz.

Model SRC20 Signal Generator

TheSRC20 is a powerful, value-priced digital signal generator housed in a durable, hand-held package. This lightweight waveform generator is ideally suited for laboratory and field requirements. The SRC20 provides extremely stable, and statistically repeatable source signals used in applications such as reverberation measurements, vibration excitation, audio system equalization, and electronic measurements. The SRC20 can be powered by one on-board 9 Volt...

Power Supply Model 2221

The Model 2221 provides the highly stable DC polarization voltage required by precision microphones along with low noise amplification enabling it to drive input and output cables as long as 500 feet. It is rugged, lightweight and will provide up to forty hours of continuous operation (with PRM902 Microphone Preamplifier) using six AA internal batteries. It can also provide sufficient current to power the PRM903 Microphone Preamplifier, which has an...

Signal Conditioner Model 2210

Battery powered microphone signal conditioning for multi-channel DAT recorders, analog tape recorders and computer-based data acquisition systems. Provides microphone polarization voltage, adjustable gain and filtering (A-weight, C-weight, or band-pass). Can also be used with ICP and charge-coupled accelerometers with the appropriate accessories. Automated sequential multi-channel sound and vibration measurements using a single or dual channel analyzer...

Miscellaneous Accessories

The PRM2101K outdoor preamplifier has been designed for permanent outdoor use in severe weather conditions. It is constructed of stainless steel to resist corrosion, and its thin profile minimizes both wind resistance and acoustic reflections. It is mounted to resist shock and will screw onto any 1.5' standard pipe thread.

Environmental Shrouds

Environmental Protection Shrouds: Larson Davis manufactures a complete line of weather protection systems (shrouds) for ½” microphones and preamplifiers. They are the perfect choice for short to mid-term measurements in inclement weather. Their special acoustic windscreen material and configuration protect the microphone and preamplifier from rain, sleet, and snow by sealing the preamplifier in a desiccated chamber, thus preserving...

Larson Davis - Model PRM2103 - Outdoor Preamplifier

New Lower Cost Alternative Outdoor Preamplifier with all the necessary functionalities of Model 426A12 The Larson Davis PRM2103 has been designed to be used with an environmental shroud for portable or permanent outdoor use in a wide range of weather conditions. The PRM2103 combines the cost savings of a standard preamplifier with features for unattended monitoring and an inexpensive shroud to create a product that is ideal for remote sound level...

Model 831-INT - Docking Station

The Model 831-INT provides the 426A12 outdoor microphone with both electrical power and control commands for its electrostatic actuator, temperature and humidity readout. The Vaisala WXT520 (SEN031) weather sensor is connected to the Model 831-INT for wind speed and direction, temperature and humidity, barometic pressure, rain and hail.

Acoustic Couplers & Ear Simulators

Whether testing an earphone, hearing aid or audiometer, there is a Larson Davis coupler to satisfy your requirements. Due to the rugged, stainless steel construction and product quality you can rely on your Larson Davis coupler or ear simulator to work dependably for many years.

Model BAS001 - Omnidirectional Sound Source

The BAS001 Source is designed to generate omni-directional sound fields for making standard compliant measurements including: reverberation time (ISO 3382, ASTM E2235), building acoustics (insertion loss, acoustic absorption area, etc: ISO 140-4 ISO 140-3, ASTM E336, ASTM E90, DIN 55 210). The BAS001 is typically used to saturate a room with a uniform acoustic field. The available high-efficiency power amplifier has no fan for cooling, allowing...

Model BAS003 - Directional Sound Source

The BAS003 Source is designed to generate homogeneous sound fields using random noise in compliance with the following standards: Building acoustics (insertion loss, acoustic absorption area, etc: ISO 140-3, ASTM E90, ISO 140-5, ASTM E966). The BAS003 is typically used to generate a noise in a free-field for the evaluation of the transmission loss index of a façade. The available high-efficiency power amplifier, BAS002, is light and can be...

Model REF500 & REF600 - Reference Sound Source

The REF500 (120/240V, 50Hz) and REF600 (120/240V, 60Hz) Reference Sound Sources are an excellent tool for providing accurate and repeatable reference sound levels. These sources offer extremely flat response over a broad frequency range and are ideal for use in such applications as sound power, sound absorption, and sound insulation measurements. The REF500/600 can be used for qualification tests on acoustical environments, sound absorption...

Model BAS002 - Amplifier

Measurement of reverberation time, sound isolation, and absorption coefficient are generally important measurements when verifying that a space or material complies with design goals. When making these measurements in the field or laboratory it is important to have equipment that is dependable, portable and easy to set up and use. When coupled with the BAS001 omnidirectional speaker or BAS003 directional speaker, the BAS002 amplifier is the ideal...

Model HVM200 - Human Vibration Meter

The HVM200 is a small rugged vibration meter with built in Wi-Fi that can be used to measure hand-arm, whole body and general vibration. It includes the metrics and frequency weightings needed to measure human vibration. This 3 channel meter meets the requirements of ISO 8041:2005 and it is designed to measure per ISO 2631-1, 2 & 5 and ISO 5349 in support of the American Conference of...

Products

Environmental Noise Monitoring Systems

Sound Level Meters

Human Vibration

Dosimeters

Calibrators

Microphones & Accessories

Sound Sources