| 摘要 |
PURPOSE: An indoor noise alarm device is provided to prevent an influence on an adjacent room caused by a noise. CONSTITUTION: A sensor unit(21) outputs a noise measurement value of a decibel unit by measuring a current noise. A comparing unit(22) compares a noise reference value with a noise measurement value delivered from the sensor unit. When a microprocessor(24) receives a noise reference value excess signal of the current noise, the microprocessor generates a control signal for an alarm. An A/D converting unit(23) converts a signal delivered from the microprocessor into an analog signal and a signal delivered from the comparing unit into a digital signal. A first switch(SW1) turns on and off a first lamp by performing on-off switching according to the control signal received from the microprocessor. A second switch(SW2) turns on and off a second lamp by performing on-off switching according to the control signal received from the microprocessor. A liquid crystal driving unit(25) drives an LCD according to the control signal received from the microprocessor and displays pre-stored character data on the LCD. [Reference numerals] (21) Sensor unit; (22) Comparing unit; (23) A/D converting unit; (24) Micro processor; (25) Liquid crystal driving unit; (27) Control unit
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