HBK handheld sound level meters Microphones

HBK handheld sound level meters: sensors and measurement devices by HBK for microphones.

Shared technical specifications for the series

Properties every model in the series has. What differs is in the models table below.

The span covered by the models of the series together — not the range of each model.

Range across the models of HBK handheld sound level meters
Maximum SPL	140.3–140.9 dB SPL
Frequency response	5–20000 Hz

One column per model: what differs between the models of the series.

Models of HBK handheld sound level meters compared by parameter
Parameter	B&K 2245	HBK 2255
Microphone sensitivity	50 mV/Pa	50 mV/Pa
ADC sampling rate	48000 samples/s	48000 samples/s
Interfaces	USB	USB
Maximum SPL	140.3 dB SPL	140.9 dB SPL
Sampling rate reference	HBK publishes the integrated meter frequency range. The stored 48 kHz value is only a conservative digital-audio transport reference; handheld selection uses the documented integrated analyzer path.	HBK publishes the integrated meter frequency range. The stored 48 kHz value is only a conservative digital-audio transport reference; handheld selection uses the documented integrated analyzer path.
Frequency response	6–20000 Hz	5–20000 Hz
Microphone polarization	Integrated prepolarized measurement microphone	Integrated prepolarized measurement microphone
Sound field	Free field / outdoor	Diffuse / reverberant field
Number of measurement channels	1	1
Acoustic standard	IEC 61672 Class 1; applicable national standards listed by HBK	IEC 61672 Class 1; applicable national standards listed by HBK
Technical specification details	6-20,000 Hz; 23.2-140.3 dB(A); IP55.	5-20,000 Hz; 23.2-140.9 dB(A); IP54.
Microphone diameter	0.5 inch	0.5 inch
A-weighted inherent noise	23.2 dB(A)	23.2 dB(A)
Protection class (DIN EN 60529)	IP55	IP54
Status	Active	Active