HS5660B( High/Low) Precision Pulse Sound Level MeterDetailed product description：

The HS5660B (high/low) precision pulse sound level meter is a low (high) measurement lower (upper) limit portable acoustic measuring instrument, which reads out the measurement results simultaneously from an electric meter and a liquid crystal display. It can be used to measure and analyze environmental, machine, vehicle, motor and other noise, as well as for building acoustics, electroacoustic measurements, etc. Especially its pulse characteristics can accurately measure impact sound and short duration noise, such as gun sound, stamping machine sound, explosion sound, typewriter noise, etc. It can also be combined with HS5721 type 1/1 octave band filter or HS5731 type 1/3 octave band filter to form a portable spectrum analyzer with easy operation. Widely applicable to the needs of environmental protection, factories, schools, scientific research and other departments for measuring and analyzing low (high) noise. The JJG188-2002 Sound Level Meter Verification Regulations and IEC61627 Sound Level Meter standards require Level 1 performance.

2、 Main technical parameters and functions:
1. Sound level measurement range: (with 2 × 10-5Pa as reference)

model	HS5660B type	HS5660C type
A weighting	22～135dB（A）	55～165dB（A）
C weighting	32～135dB（C）	65～165dB（C）
linear	40-135dB (linear)	70-165dB (linear)

2. Frequency range: 20Hz-20KHz;
3. Frequency weighting: A, C weighting, and F (linear);
4. Detection characteristics: true effective value and peak value;
5. Time weighting: fast, slow, pulse;
6. Overload indicator: LED light emitting diode;
7. Power supply: 6V DC, 4 1.5V high-energy batteries, and equipped with an external (220V) DC conversion power input port;
8. Built in 1000Hz sine calibration signal, which can be used for reference calibration;
9. Equipped with AC and DC output terminals, it can be used in conjunction with filters and other devices for further processing and analysis of sound signals.

3、 Other:
1. Select attachments: calibrator, extension cable (10m/15m/30m), tripod, and dedicated AC accessories;
2. Dimensions: 290mm × 106mm × 65mm;
3. Basic configuration: host, hood, clock screwdriver, carrying case