Exam Preview for 20709: Classroom Acoustic Measures...There's an Ap

Classroom Acoustic Measures...There's an App for That, Presented in Partnership with the Educational Audiology Association

Please note: exam questions are subject to change.

1. What ANSI classroom performance measures can be made using a smart phone app? background noise level reverberation time Both A & B None of the above
2. Audiologists are primarily deterred from making classroom measurements by: expense of measuring equipment lack of knowledge about acoustics lack of motivation to improve room acoustics lack of interest
3. The impulse response is used in AudioTools to estimate background noise level harmonic distortion level reverberation time transient distortion level
4. Classroom background noise measurements are reported in dBD dBQ dBA dBE
5. Which of the following statements is NOT true? the internal microphones of smartdevices may be adequate to make screening acoustic measurements an external smartdevice microphone can make measurements that approach ANSI type 2 sound level meters all acoustic measurement apps are appropriate for classroom screening it is necessary for the app to make measurements in dBA
6. How can smart device measurements be shared? visually on device screen by emailing picture of device screen by projecting device screen with LCD projector all of the above
7. Before making acoustic measurements with a smart device you MUST calibrate the microphone used turn the device on start the acoustic app all of the above
8. It is recommended that the sound used to calibrate a smart acoustic measuring device should be: speech or white noise monosyllabic words spondees sentence length material
9. An SPL graph as demonstrated provides: information about the frequency content of the background noise information about the sound level as a function of frequency information about the sound level as a function of time information about the spectrum of the measured signal
10. The signal used to make reverberation measures typically is generated with a shotgun balloon fire cracker small bomb