Help with Sound Level Meters and Noise Dosimeters specifications:
Specifications
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| Meter Style | |||
| Your choices are... | |||
| Sound Level Meter | Unit for measuring Sound Pressure Level (SPL) and different weightings such as A-weighted SPL, C-weighted SPL, Sound Exposure Level, etc. | ||
| Noise Dosimeter | Specific measurement capability for defined industrial safety criteria. Typical measure is sound exposure for an 8-hour period; other criteria may apply. | ||
| Sound Level / Noise Dosimeter Combination | One unit or meter with both capabilities. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| Frequency Range: | Frequency Range is the range of frequencies for which the meter maintains a constant sensitivity within defined boundaries. Functionally, this is the operational range of the meter. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
| Sound Level Range: | Sound level range is limited on the low end by the inherent noise of the acoustic system and on the high end by the maximum sound pressure level. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
Sound Level Measurement Modes
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| Your choices are... | |||
| Flat (Unweighted) SPL | Straight physical quantity with no weighting. | ||
| A-Weighted SPL (LA) | A-weighting is a frequency domain weighting based on human hearing response; filters out low frequency sound to approximate the response of the human ear. | ||
| C-Weighted SPL (LC) | C-Weighting filters less low frequency sound than A-weighting; closer representation of acoustic energy across all frequencies. | ||
| A-Weighted Sound Exposure Level (LAE) | Defined for short or one-time sounds as the equivalent 1-second level. | ||
| Equivalent Continuous SPL (Leq) | Noise Level of a continuous steady sound whose time-averaged power equals that of the fluctuating noise under measurement. | ||
| Percentile SPL (LX) | Percentage of time during a given measurement period that the instantaneous measurement exceeds a given value. May independently show predefined levels such as L5 or L95, etc. | ||
| Other | Specialized weighting modes include B, D, and G. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
Noise Dosimeter Measurement
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| Threshold Level Range: | Threshold Level is set for the beginning of meaningful measurement; discounts irrelevant low-level noise. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
| Criterion Level Range: | Criterion is the standard noise level to which the exposure or dose will be compared. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
| 8-hour Dose Measurement? | One standard elapsed time dose measurement. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
User Interface Options
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| Control Panel: | |||
| Your choices are... | |||
| Analog | Has analog user inputs such as potentiometers, dials, switches, etc. | ||
| Digital | Setup or program through the front panel using digital keypad, menus, etc. | ||
| Computer Interface | Can be controlled or monitored remotely with a computer via interface. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| Interface Options: | |||
| Your choices are... | |||
| Serial | Serial communication protocol such as RS-232, RS-485, USB. | ||
| Parallel | GPIB / IEEE-488 / HPIB Protocol. | ||
| Other | Special requirements such as modem, RF transmitter, etc. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| Display | |||
| Your choices are... | |||
| Analog Meter / Indicator | Includes needle meters, LED indicators, etc. | ||
| Digital Readouts | Numerical or application-specific readouts. | ||
| Video Display Terminal | VDT styles include CRT, flat panel displays, etc. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| Application Software Included? | For control or for monitoring meter performance. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
Features
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| Your choices are... | |||
| Auxiliary Output(s) | Meter puts out an analog voltage, current, etc., which can be monitored by other equipment. | ||
| Outdoor Rated | Meter or Casing can withstand outdoor environment. | ||
| Human (Hand-Arm) Vibration | Measures industrial, environmental or occupational vibration such as power tools, nearby trains, etc. | ||
| Data Storage | Integral or on-board reading storage capability. | ||
| Spectrum (Frequency) Analysis | Analyzes and / or displays readings in the frequency domain. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
Environment
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| Operating Humidity Range: | |||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
| Operating Temperature Range: | |||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||