This artifact is a precision sound level meter made in the 1960s. This device is unique in being the world’s first model to be a handheld, transitioned sound level meter. A sound level meter is a measuring instrument used to assess noise or sound levels by measuring sound pressure within the air. This object is made by the Danish company Brüel & Kjær. Used in Aviation to measure the intensity of sound waves, the device plays an important role on board aircraft. Use of this device is extremely important because it ensures that all sound exposures are below the threshold of what is considered safe for human ears and measures the need for ear protection or safe distancing.
Precision sound Level Meter: Type 2203