| 主权项 |
1. A SPL monitoring system comprising:
an audio transducer, where the audio transducer is configured to receive sound pressure, and where the audio transducer outputs a plurality of electronic signals, where each electronic signal represents a sound pressure level (SPL) for a particular frequency band; a logic circuit, where time is broken into increments of time, where the logic circuit measures and stores in a memory storage system an exposure time duration when the SPL of the respective electronic signal exceeds a threshold value for the particular frequency band of the electronic signal and stores the SPL associated with each increment of time in the exposure time duration, and where the logic circuit measures and stores a recovery time duration when the SPL of the respective electronic signal drops below the threshold value for the particular frequency band of the electronic signal and stores the SPL associated with each increment of time in the recovery time duration, where the logic circuit calculates over an averaging time interval an average SPL dose within the averaging time interval, and where the logic circuit calculates a safe time duration over which a user can receive current sound pressure values; and an indicator element, where the indicator element produces a notification when an indicator level occurs, where the indicator level is at least one of:
when the safe time duration has been exceeded;when a listening duration is within a certain percentage range of the safe time duration;when the listening duration is within various levels, where each level is represented by an indicator color and where each level represents a percentage range of the safe time duration;when a power is low; andwhen at least one feature is not working. |
