Qué es un sonido nivel metro (ruido medidor)
There are generally three types of weighting networks: A, B, and C. The A-weighted sound level simulates the frequency characteristics of the human ear for low-intensity noise below 55dB, the B-weighted sound level simulates the frequency characteristics of moderate-intensity noise from 55dB to 85dB, and the C-weighted sound level simulates the frequency characteristics of high-intensity noise . The main difference between the three is the degree of attenuation of the low-frequency components of the noise. A attenuates the most, B takes the second place, and C is the least. The A-weighted sound level is the most widely used in noise measurement in the world because its characteristic curve is close to the hearing characteristics of the human ear, and B and C are gradually used.
definición:
Noise meter, also known as (noise meter, sound level meter) is the most basic instrument in noise measurement. A sound level meter is generally composed of a condenser microphone, a preamplificador, an attenuator, an amplifier, a frequency meter network, and an effective value indicating meter. El principio de funcionamiento de el sonido nivel metro es: el micrófono convierte el sonido en an eléctrico señal, y entonces el preamplificador transforma el impedancia a igualar el micrófono con el atenuador. El amplificador añade el salida señal a la red, realiza frecuencia ponderación en la señal (o an externo filtro), y entonces amplifica la señal a a cierta amplitud a travde el atenuador y el amplificador, and senvía it a a el RMS detector.
Clasificación:
1. De la medición objeto, it can be divided into the characteristic measurement of environmental noise (sound field) and the measurement of sound source features. the
2. Desde el tiempo características de el sonido fuente o sonido campo, it can be divided into steady-state noise measurement and unsteady-state noise measurement. Non-stationary noise can be divided into periodic noise, irregular noise and pulse sound. the
3. Desde la frecuencia características de el sonido fuente o sonido campo, it can be divided into broadband noise, narrowband noise and noise containing prominente pure tone components. the
4. De la exactitud de medición requisitos, it can be divided into precision measurement, engineering measurement and noise survey.
