Schumann wave is a beneficial pulsating rhythmic wave that appears in the ionosphere of the atmosphere. Its frequency is 7.83Hz, which is exactly the same as the frequency of the hippocampus in the brain of mammals.
It helps with sleep and improves the taste of wine, tea and water.
Relieve stress, 3 color LEDs, a 7.83Hz working indicator light, and a purple sterilization LED that flashes according to the working frequency.
It comes with a USB cable and can be directly plugged into a 5V power supply for use.
High-precision microphone: High-sensitivity 1/2-inch condenser microphone with high precision, high sensitivity and fast instantaneous response characteristics.
Back bracket design: Hidden bracket design, can be placed on the desktop.
Upper limit alarm prompt: The upper limit alarm threshold can be set; when the measurement is higher than the set threshold, the buzzer will sound an alarm prompt, and the alarm prompt light will flash. The time can be set to: 6s~120s.
Back panel design: There are 2 ventilation holes on the top and bottom, and the response speed is more sensitive.
Data storage: The instrument automatically stores data every 2s, and the stored value is the maximum noise value in 2s. The instrument can store data continuously for one year. After one year, the instrument automatically clears the data six months ago, and the user can export the data through the computer software. The record can be cleared (automatically overwrite the first half of the year after one year)
Analog bar level indication: The six-grid indicator light 30~75dB displays green, and 76~130dB displays red.
Measuring range: 30dB~130dB
Accuracy: +/-1.5dB (based on standard sound source, 94dB 1KHz)