EXTECH 407790A: Real Time Octave Band Analyzer

EXTECH 407790A: Real Time Octave Band Analyzer

Extech 407790A: Real Time Octave Band Analyzer

The Extech 407790A is a professional-grade Type 2 Integrating Sound Level Meter equipped with real-time octave and 1/3 octave band analysis. It features a large 3.5″ color TFT display for real-time visualization of acoustic data, making it ideal for environmental noise monitoring, industrial hygiene, and acoustic research.

Its wide dynamic measurement range and multi-functional readout capabilities allow for precise monitoring of various acoustic parameters, including Leq, Lmax, Lmin, Lp, and percentile values such as L05, L10, L50, L90, and L95. A microSD card enables extended data logging and storage, and an optional microphone extension cable supports remote or enclosed-area measurements.

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Key Features EXTECH 407790A: Real Time Octave Band Analyzer 

• Real-time octave and 1/3 octave band analysis

• Large 3.5″ color TFT LCD (320×240) with backlight for easy data viewing

• Wide measurement range in five selectable intervals:

  • 20–90dB, 20–100dB, 20–110dB, 30–120dB, and 40–130dB

• Displays key acoustic metrics: Leq, LE, Lmax, Lmin, Lp, L05, L10, L50, L90, L95

• Offers Fast, Slow, 10ms (t), and Impulse (I) response times

• Supports A, C, and Z frequency weightings

• MicroSD card memory for large-volume data logging (card included)

• Optional remote microphone extension (Model 407764-EXT) for flexibility in measurement locations

• AC and DC analog outputs for connection to external equipment

• Designed for professional applications in sound level monitoring, occupational safety, and noise compliance

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Specifications

• Sound Range: 20–90dB, 20–100dB, 20–110dB, 30–120dB, 40–130dB

• Accuracy: ±1.5dB (reference 94dB @ 1kHz)

• Frequency Bandwidth: 25Hz to 10kHz

• Weighting Modes: A, C, Z

• Response Times: Fast, Slow, 10ms (t), Impulse (I)

• Analog Output:

  • AC Output: 1 Vrms at full scale

  • DC Output: 3.0V, 25mV/dB

• Microphone Type: 0.52″ (13.2 mm) condenser microphone

• Memory Storage: microSD card (included)

• Power Supply:

  • 4 × C (1.5V) batteries

  • External power supply: 6V DC, 1A

• Certifications: CE

• Dimensions: 13.6 × 3.9 × 2.4 inches (345 × 100 × 60 mm)

• Weight: 33.5 oz (950 g)

• Warranty: 2 years

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Summary

The Extech 407790A is a comprehensive real-time octave band sound analyzer tailored for professional acoustic analysis, regulatory compliance, and industrial applications. Its wide measurement range, real-time display capabilities, and detailed acoustic metrics make it a powerful tool for sound professionals who demand precision and flexibility in the field.