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GRAS 40HF
GRAS 40HF
GRAS 40HF

The 40HF is a 1" low-noise system measuring sound below human hearing threshold, noise floor below -10 dB, suitable for sound power measurements on very quiet products with extremely wide dynamic range.

· Key Specifications:

  • Sensitivity: High.
  • Dynamic range: Below -10 dB to high.
  • Frequency range: 10 Hz to 10 kHz.
  • Noise floor: Very low (below hearing).
  • Connector: Complete system.
  • Polarization: Externally polarized.
  • Size: 1".
  • Application: Quiet product testing.
Product details
Related Products
GRAS 46AM
GRAS 46AM

The 46AM is a 1/2" CCP free-field microphone set with wide frequency range, 50 mV/Pa sensitivity, suitable for high-frequency sound measurement with extended dynamic range.

· Key Specifications:

  • Sensitivity: 50 mV/Pa.
  • Dynamic range: 15 dB(A) to 148 dB.
  • Frequency range: 2.6 Hz to 70 kHz.
  • Operating temperature: -30°C to +85°C.
  • Connector: BNC.
  • Type: Free-field wide frequency.
  • TEDS: Yes.
  • Standard: IEC 61094.
GRAS 46AZ
GRAS 46AZ

The 46AZ is a 1/2" CCP free-field low-frequency microphone set, high sensitivity for measuring infrasound like wind turbine or low vibration.

· Key Specifications:

  • Sensitivity: High (low frequency optimized).
  • Dynamic range: Wide low noise.
  • Frequency range: Low frequency (down to low Hz).
  • Operating temperature: -30°C to +85°C.
  • Connector: BNC.
  • Type: Free-field low frequency.
  • TEDS: Yes.
  • Application: Wind turbine, infrasound.
GRAS 46BG
GRAS 46BG

The 46BG is a 1/4" CCP pressure high pressure microphone set, low sensitivity for very high sound levels.

· Key Specifications:

  • Sensitivity: Low (high pressure optimized).
  • Dynamic range: High peak (up to high dB).
  • Frequency range: High frequency.
  • Operating temperature: -30°C to +100°C.
  • Connector: Microdot.
  • Type: Pressure high pressure.
  • TEDS: Yes.
  • Peak SPL: Very high.
GRAS 47BG-FV
GRAS 47BG-FV

The 47BG-FV is a miniature 1/4" CCP flush-mount high pressure front vented microphone set, handling very high levels, suitable for surface measurements in limited spaces with front venting.

· Key Specifications:

  • Sensitivity: Low for high pressure.
  • Dynamic range: High peak SPL.
  • Frequency range: High frequency.
  • Operating temperature: -30°C to +100°C.
  • Connector: CCP.
  • Mounting: Flush-mount.
  • Venting: Front.
  • Size: 1/4".
GRAS 46DE
GRAS 46DE

The 46DE is the smallest 1/8" CCP pressure microphone set in the GRAS line, designed for sound measurements in extremely limited spaces, with high durability and shock resistance for industrial applications.

· Key Specifications:

  • Sensitivity: Approximately 1 mV/Pa.
  • Dynamic range: Approximately 50 dB(A) to 172 dB.
  • Frequency range: 20 Hz to 140 kHz.
  • Operating temperature: -30°C to +100°C.
  • Connector: Microdot.
  • Polarization: 0 V.
  • TEDS: Yes.
  • Size: Smallest 1/8".
GRAS 50GI-P
GRAS 50GI-P

The 50GI-P is a rugged CCP intensity probe for heavy industrial environments, phase-matched, high durability with spacers for wide frequency range.

· Key Specifications:

  • Sensitivity: 12.5 mV/Pa.
  • Dynamic range: Wide.
  • Frequency range: IEC Class 1.
  • Connector: CCP.
  • Phase matched: Yes.
  • Rugged: Yes.
  • Spacers: 12-50 mm.
  • Application: Heavy industrial.
GRAS 46BH-1
GRAS 46BH-1

The 46BH-1 is a 1/4" LEMO pressure high pressure microphone set with 200V polarization, low sensitivity for very high sound levels.

· Key Specifications:

  • Sensitivity: Low for high pressure.
  • Dynamic range: High peak SPL.
  • Frequency range: High frequency.
  • Operating temperature: -30°C to +100°C.
  • Connector: LEMO.
  • Polarization: 200 V.
  • TEDS: Yes.
  • Type: Pressure high pressure.
GRAS 46AQ
GRAS 46AQ

The 46AQ is a 1/2" CCP random incidence microphone set, 50 mV/Pa sensitivity, suitable for diffuse sound field measurements in reverberant environments like vehicle cabins.

· Key Specifications:

  • Sensitivity: 50 mV/Pa.
  • Dynamic range: 17 dB(A) to 138 dB.
  • Frequency range: 3.15 Hz to 16 kHz.
  • Operating temperature: -30°C to +85°C.
  • Connector: BNC.
  • Type: Random incidence.
  • TEDS: Yes.
  • Standard: IEC 61094 WS2D.