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Noise Dosimeter

SV 104

The SV 104 is a noise dosimeter that meets the specifications of IEC 61252 and ANSI S1.25-1991 for measuring workplace noise levels and hearing protection by health and safety regulations. The instrument measures noise dose and noise levels in the large measurement range of 55 dB to 140 dB. Results are recorded into three independently configurable profiles, which means that the measurement can be performed per three different sets of settings simultaneously (such as exchange rate or time constants). The SV 104 noise dosimeter uses a patented MEMS microphone that is covered by a lifetime warranty. This ensures that the noise exposure measurements are as accurate as possible under the ISO 9612, OSHA, MSHA, and ACGIH guidelines.

 

 

What is a noise dosimeter?

A noise dosimeter (or dose meter) is a sound measuring device meeting IEC 61252:2017 (Europe) or ANSI/ASA S1.25-1991 (United States) performance specifications for personal sound exposure meters. Noise dosimeters are used for determinations of occupational noise exposure, by ISO 1999 and ISO 9612 in Europe and OSHA, MSHA, and ACGIH in the United States. By IEC 61252:2017, the noise dosimeter accuracy corresponds to those for a class 2 integrating averaging sound level meters as given in IEC 61672-1 in the frequency range from 20 Hz to 8 kHz

 

 

noise dosimeter
Personal Noise Dosimeters
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MEMS microphone
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Personal Noise Dosimeters

Features

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How to use?

Wearable noise dosimeter

The primary use of a wearable noise dosimeter is to measure noise levels close to a person's head, for example, to determine their occupational noise exposure in compliance with ISO 1999 and ISO 9612 International Standards or OSHA, MSHA, and ACGIH guidelines. A wearable noise dosimeter is a small sound level meter that people wear. It is typically worn on the shoulder, collar, or other location close to the ear. This type of usage makes the noise exposure measurement an unattended one. For this purpose, the SV 104 has been equipped with multiple features for automatic event detection and noise source validation.
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When do you use noise dosimeters?

What factors determine the need for noise dose measurement?

A noise dosimeter is used to measure the noise level of a worker when there is a risk of noise levels reaching or exceeding the noise exposure 8-hours threshold level of 85 dBA. Similarly, whenever a change may cause employees' noise exposure to increase, or when the current hearing protection workers are using may not meet safety requirements, personal noise exposure measurements must be used.
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Calibration

Noise dosimeter calibration with an acoustic calibrator

For field calibration, the noise dosimeter provides a means for the user to check and adjust sensitivity at the calibration check frequency using a sound calibrator. Once the microphone is inserted into the sound calibrator, the auto-calibration facility starts the calibration process automatically. Noise dosimeters should be calibrated periodically at accredited laboratories following procedures described in IEC 616252.
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Noise Dosimeter vs Sound Level Meter

What is the difference between sound level meters and noise dosimeters?

The difference between a noise dosimeter and a sound level meter is that the noise dosimeter is worn on a worker's shoulder, while the sound level meter is handheld or used on a tripod. The specifications for both sound level meters and noise dosimeters usually correspond to those for class 2 sound level meters, as given in IEC 61672-1.
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Accuracy

Noise dosimeter accuracy

The noise dosimeter accuracy corresponds to those for class 2 integrating sound level meters as given in IEC 61672-1 for an A-weighted sound pressure level range from 70 dB to 137 dB and a nominal frequency range from 20 Hz to 8 kHz. The built-in tri-axial accelerometer ensures reliability by recording any shocks or vibrations that may affect the sound level results. The time history is cleared of any undesirable noise levels, making them easy to eliminate from the dose calculation.
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Noise Dose Calculation

The dedicated Supervisor pc software can help you calculate your noise exposure.

The SV 104 works with the Supervisor pc software package that helps you calculate how much noise you are exposed to. This follows international standards for doing this, such as ISO 9612, OSHA, MSHA, and ACGIH. You can use the data files from the SV 104 to figure out your noise exposure. In addition, the results from the dosimeter can be used for hearing protection selection.
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How to use?

Wearable noise dosimeter

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When do you use noise dosimeters?

What factors determine the need for noise dose measurement?

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Calibration

Noise dosimeter calibration with an acoustic calibrator

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Noise Dosimeter vs Sound Level Meter

What is the difference between sound level meters and noise dosimeters?

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sv104-noise-dosimeter-accuracy

Accuracy

Noise dosimeter accuracy

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Noise Dose Calculation

The dedicated Supervisor pc software can help you calculate your noise exposure.

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Occupational Noise Measurements

Applications

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Occupational Noise

Noise dosimeters conforming to IEC 61252 and ANSI S1.25-1991

The SV 104 is a dosimeter that meets the standards set by IEC 61252 and ANSI S1.25-1991. These noise dosimeters are used to monitor occupational noise exposure, which ranges from 55 dB to 140 dB. To measure how much noise someone is exposed to, the SV 104 can create three different profiles, each measuring a different standard, with configurable settings such as criterion level or an exchange rate.
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Noise dosimeters

Videos

Personal noise dosimeters

Use of PC software

Price or Noise Dosimeter Hire

SV 104 – Noise Dosimeter

SV 104 – Noise Dosimeter

The SV 104 kit includes a shock-resistant MEMS microphone with a LIFETIME WARRANTY, windscreen, 8 GB memory and USB cable for communication with a PC. Each SV 104 has a factory calibration certificate and a 36-MONTH WARRANTY upon product registration. The standard kit also includes a license for PC software.

See all accessories
SF104_OCT - License of 1/1 octave analysis for SV 104

SF104_OCT - License of 1/1 octave analysis for SV 104

License of 1/1 octave analysis for SV 104

SF104_WAV - License of Audio events recording for SV 104

SF104_WAV - License of Audio events recording for SV 104

License of Audio events recording for SV 104

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    Noise dosimeter

    Specification

    SV 104 – Noise Dosimeter

    Applications

    Sound measurements
    Occupational noise

    Hardware Features

    Number of channels 1
    Intrisic safety
    Self-vibration detection
    Auto-calibration
    Keyboard lock
    Remote communication
    Bluetooth
    Communication Interfaces USB, infrared
    LED indicator
    Display
    Keyboard 3 push buttons
    Memory 8 GB
    Battery type Ni-MH rechargeable cells
    Operating time > 40 hours
    Operating temperature range -10 °C ÷ +50 °C
    Humidity range up to 95 % RH
    Weight 121 g
    Size 88 x 49.5 x 19.2 mm
    Docking station required

    Sound measurements features

    Standards IEC 61252 ed1.1 (2002); ANSI S1.25-1991 (R2020)
    Microphone type ST 104C MEMS microphone
    Linear operating range to IEC 61672 55 dBA RMS ÷ 140.1 dBA Peak
    Total measurement range 50 dBA RMS ÷ 140.1 dBA Peak
    Frequency range 20 Hz ÷ 10 kHz
    Weighting filters A, C and Z
    Time constants Slow, Fast, Impulse
    Exchange rates 2, 3, 4, 5, 6
    Criterion levels selectable
    Profiles per channel 3 with independent filters (x) and time constants (y)
    Min logging step 1s logger step
    Statistics in octaves or third octaves
    Audio recording option
    Voice coments
    1/1 octave option

    SV 104

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