Misheng Group Limited products
Bedrock Elite - Sound Analyzer, Class 1, full options
Introducing the Bedrock Elite i10 Measuring Instrument, your ultimate solution for advanced noise and acoustic measurements. Designed to surpass industry standards, the Bedrock Elite i10 offers superior functionality and cutting-edge features for professionals in sound engineering, environmental monitoring, and research. COMPREHENSIVE MODULE LIST Class 1 / Type 1 sound level meter (fast, slow, impulse; A/C.Z-weighting, Leq, SEL) conforming to IEC-61672 class 1, ANSI S1.4 Type 1. STIPA measuring (quick screening mode, pro mode, averaging mode) and Full STI Statistical acoustics (L10, L90, etc) Real Time Analyzer (1/12, 1/6, 1/3 and 1/1 octave) FFT analyzer RT60 measuring (reverberation times: T20/T30/EDT). Noise Curves (NR, NC, PNC, NCB, RC, RC mark II) THD+N Fundamental frequency estimation Building acoustics: D, R’, DnT, Dn, SRI/STC Audio oscilloscope Long term logging and monitoring (LEQ, RTA) AC Volt meter for audio line level measurements (dBU, dBV, V rms)
NoiseQC - NoiseQC End Of Line Quality Control
End of Line Quality Control Go – No Go: NoiseQC tests all noise emitting products (end of line) Using Acoustics or Vibrations Motors Pumps Turbines Electrical moving parts Fans Other rotating parts And many more
Convergence - MEMS sound level meter data logger / Noise monitoring
The Sound Level Meter Data Logger NSRT_mk4 is the 4th generation of Convergence Instrument’s smart integrating sound-level meter/datalogger. It includes a type 1 digital MEMS microphone, an accurate date/time clock, and a non-volatile 128 Mb recording memory with a fast USB download. Running on battery, it can record sound pressure levels for a week. Connected to an external USB charger it can record for months. Its very small size allows it to be attached to or embedded within the monitored equipment. USB Audio interface included.
PLACID Instruments - Measurement microphone set, Class 1, 50 mv/Pa, prepolarized
Measurement microphone sets The PMP21-1 is a 1/2” pre-polarized free-field microphone, classified per IEC 61094 as WS2F Class 1 with preamplifier. Frequency range: 20 Hz to 20 kHz Dynamic range: 16 dBA to 146 dB (A) Nominal Sensitivity: 50 mV/Pa
PLACI - Impedance tube, Kundt’s tube, sound absorption and transmission loss
The impedance tube (also know as Kundt Tube) measurement obtains the normal incidence absorption coefficient of a layer of textiles with a small diameter (usually less than 10 cm) The results can be used to compare the basic absorption performance of the material and for acoustics simulations. In practice, the absorbers can be quite large, and their structure and configuration may be complex and part of acoustic designs. Furthermore, they will be exposed to real sound fields where the incident sound may come from many directions.