Quest Technologies offers lightweight octave band filters that adapt easily to the modular design of the entire Advanced Series of Sound Level Meters.

The OB-300 combination 1/3 & 1/1 Octave Band Filter Set gives you a choice of measuring 33 one-third-octave bands or 11 standard full octave bands. The OB-300 will manually or automatically sequence through each octave or third octave band and display the measured level on the sound level meter. The OB-100 is identical to the OB-300 except that measurements are made in full octave bands only.

OB-100 Technical Specifications:

Standards:

• ANSI S1.11-1986, Order 3, Type 2, Sub-Type C and IEC R225-1966.

Center Frequencies:

• 10 frequencies from 31.5 Hz to 16 kHz

Frequency Selection:

• Full manual control or automatic sequential stepping through each frequency.

Power Source:

• Sound Level Meter

Size:

• 3.3 x 2.8 x 1.8 inches (84 x 71 x 47 mm)

Weight:

• 6 ounces (170 grams)

OB-300 Technical Specifications:

Standards:

• ANSI S1.11-1986, Order 3, Type 2, Sub-Type C and IEC R225-1966.

Center Frequencies:

• (1/3 Mode) 33 frequencies from 12.5 Hz to 20 kHz. (1/1 Mode) 11 frequencies from 16 Hz to 16 kHz.

Frequency Selection:

• Full manual control or automatic sequential stepping through each frequency.

Power Source:

• Sound Level Meter

Size:

• 3.3 x 4.2 x 1.8 inches (84 x 107 x 47 mm)

Weight:

• 9 ounces (255 grams)