Patent ID: 9478229
Filing Date: 2016-10-25
CPC Classification: G06F,G10L,G11B,H04R

Claim Text:
1. A portable system for continuously recording sound pressure due to both continuous noise and impulse noise in an environment, the portable system comprising: a first microphone to produce a first analog signal representative of impulse noise sound pressure in a first amplitude range from about 100 dB to about 180 dB; a second microphone to produce a second analog signal representative of continuous noise sound pressure in a second amplitude range from about 20 dB to about 140 dB, the second amplitude range being different from the first amplitude range; at least one analog-to-digital converter (ADC), operably coupled to the first microphone and the second microphone, to sample: a combining node, operably coupled to the at least one ADC, to combine the first digital signal and the second digital signal into a combined digital signal having a combined amplitude range, the combined amplitude range being larger than the first amplitude range, larger than the second amplitude range, and less than or about equal to the sum of the first amplitude range and the second amplitude range, the combined digital signal representing both the continuous noise and the impulse noise in the environment; and a processor, operably coupled to the combining node, to store a representation of the combined digital signal in a nonvolatile memory.