When you are listening to stereo headphones or a personal music player, can a person standing next to you hear it too? (When you are using a personal music player, you should be able to understand a person next to you speaking in a normal tone of voice.) Questions to determine whether you are being exposed to excessive sound that may damage your hearing.Īre you often in an environment where the sound is so loud that you have to shout to make yourself understood?Īfter exposure to loud sound, have you ever noticed tinnitus (ringing or other noises in your ears or head)?ĭoes music sound slightly strange or distorted after you have been listening for a while?ĭo voices sound muffled after you’ve been around loud music or other loud sounds for an extended time?Īfter exposure to loud sounds do your ears sometimes feel “full” or “stopped up”?
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This will be the initial sound level and the zero distance for comparing sound levels change with distance. Adjust the speed of the blender or volume of the radio to get as close to a steady 80 dB reading as possible.Have a student hold the sound level meter (phone or computer microphone) about 4 inches away from the radio or blender.If using a blender, turn it onto the loudest setting
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If using a radio, turn on the radio and de-tune near a known radio station until there is a constant static sound. Place blender or radio near the edge of a flat surface facing the classroom.