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Tinnitus (ringing, buzzing or hissing in the ears) that occurs for only a short time after exposure to high noise levels is an early warning sign that your hearing is at risk and you may have suffered some permanent loss of hearing acuity.
1 Beeping or chirping from a CO carbon monoxide detector alarm, a sound that is not continuous but sounds every few minutes, may indicate a dead or dying battery-replace the battery; if the alarm is in doubtful condition replace it.ere are some causes of Carbon Monoxide Detector alarms sounding: 1  The CO alarm has detected carbon monoxide in the building at a dangerous level. 2  The alarm may sound if there is a sudden surge of high concentrations of CO or it may sound if lower levels of CO have been present for a longer period.