A respiratory monitor comprising: a first sensor configured to generate a respiration-related motion monitoring signal indicative of respiration-related motion; a second sensor (20, 22) configured to generate a sound monitoring signal indicative of respiration-related sound; and a signals synthesizer configured to synthesize a respiratory monitor signal based on the respiration-related motion monitoring signal and the respiration-related sound monitoring signal, characterized in that the first sensor and the second sensor (20, 22) comprise: a sensor, which is configured to generate a sensor signal indicative of both respiration-related motion and respiration-related sound and which comprises a) an accelerometer configured for attachment to a respiring subject, b) a magnetometer coupled with the accelerometer, and c) a signal processor (54, 64) configured to generate the sensor signal based on an accelerometer signal output by the accelerometer and a magnetometer signal output by the magnetometer; a first filter configured to extract from the sensor signal a low frequency signal encompassing frequencies of respiration-related motion, the respiration-related motion monitoring signal being based on the low frequency signal; and a second filter configured to extract from the sensor signal a high frequency signal encompassing frequencies of respiration-related sound, the respiration-related sound monitoring signal being based on the high frequency signal. a first sensor configured to generate a respiration-related motion monitoring signal indicative of respiration-related motion; a second sensor (20, 22) configured to generate a sound monitoring signal indicative of respiration-related sound; and a signals synthesizer configured to synthesize a respiratory monitor signal based on the respiration-related motion monitoring signal and the respiration-related sound monitoring signal, characterized in that the first sensor and the second sensor (20, 22) comprise: a sensor, which is configured to generate a sensor signal indicative of both respiration-related motion and respiration-related sound and which comprises a) an accelerometer configured for attachment to a respiring subject, b) a magnetometer coupled with the accelerometer, and c) a signal processor (54, 64) configured to generate the sensor signal based on an accelerometer signal output by the accelerometer and a magnetometer signal output by the magnetometer; a first filter configured to extract from the sensor signal a low frequency signal encompassing frequencies of respiration-related motion, the respiration-related motion monitoring signal being based on the low frequency signal; and a second filter configured to extract from the sensor signal a high frequency signal encompassing frequencies of respiration-related sound, the respiration-related sound monitoring signal being based on the high frequency signal. a sensor, which is configured to generate a sensor signal indicative of both respiration-related motion and respiration-related sound and which comprises a) an accelerometer configured for attachment to a respiring subject, b) a magnetometer coupled with the accelerometer, and c) a signal processor (54, 64) configured to generate the sensor signal based on an accelerometer signal output by the accelerometer and a magnetometer signal output by the magnetometer; a first filter configured to extract from the sensor signal a low frequency signal encompassing frequencies of respiration-related motion, the respiration-related motion monitoring signal being based on the low frequency signal; and a second filter configured to extract from the sensor signal a high frequency signal encompassing frequencies of respiration-related sound, the respiration-related sound monitoring signal being based on the high frequency signal.