a loud resonant repeating noise

a loud resonant repeating noise

extraneous noise contaminating sound measurements that cannot be separated from the desired signal

extraneous noise contaminating sound measurements that cannot be separated from the desired signal

extraneous noise contaminating sound measurements that cannot be separated from the desired signal

extraneous noise contaminating sound measurements that cannot be separated from the desired signal

extraneous noise contaminating sound measurements that cannot be separated from the desired signal

extraneous noise contaminating sound measurements that cannot be separated from the desired signal

extraneous noise contaminating sound measurements that cannot be separated from the desired signal

extraneous noise contaminating sound measurements that cannot be separated from the desired signal