This free, advertising-free and data protection compliant sound analysis app was specially developed for science classes. You can find detailed operating instructions, lots of experiment instructions for acoustics and mechanics experiments and a version for older devices (version 2.2) at www.spaichinger-schallpegelmesser.de. If you have any problems, please contact me by email (Ziegler@spaichinger-schallpegelmesser.de). The new version 2.8 can unfortunately only be made available for Android 8.0 and newer. Earlier Android versions get an older version of the Spaichinger sound analyzer via the app store.
This freeware app has 9 windows that can be displayed as single or double windows:
o Storage oscilloscope: the course of the sound pressure as a function of time
o Frequency spectrum (FFT)
o Fundamental frequency of a sound (in Hz) and indication of the associated musical note
o Double tone generator for the simultaneous generation of up to two different tones with phase shift (e.g. for beats)
o Pulse generator to generate "cracking noises" (e.g. for the speed of sound)
o Noise lights
o Effective sound pressure (in Pa) and sound intensity under normal conditions
o Sound pressure level (in dB)
o A-weighted sound pressure level (in dB (A))
In addition, sound examinations can be carried out with the help of the enclosed wave recordings of musical instruments. In this musical instrument collection you will also find the wonderful overtone singing by Wolfgang Saus.
The measurements can be saved, opened and sent as a wave file (via Bluetooth, e-mail, ...). Playback is also possible, i.e. the sound recording can be listened to again while the wave file is being played, whereby all values are displayed as during the recording at the same time.
Sending the values as a CSV file is also possible.
The basic frequency of a sound determined by the app with great accuracy (deviation: max. 0.2 Hz) is helpful for analyzing musical instruments or voices of musical instruments. In addition to the base frequency, the musical note and the frequency of the note that is close to the base frequency are displayed. This enables musical instruments (especially guitars) to be tuned easily and precisely.
The graphs can be zoomed as required.
With the "Extended measurement fast" option, recordings with a maximum length of 60 seconds can be made, which can be analyzed in detail manually after the recording.
The sound level values (including effective sound pressure and sound intensity) are not particularly accurate, as the built-in microphones do not have a constant frequency response and no omnidirectional characteristics. The sound level values can be calibrated (one-point calibration), but this does not change the quality of the built-in microphones. An external measurement microphone should be used to obtain more accurate results. The sound level values are nevertheless helpful for physics lessons, as they can convey a feeling for the order of magnitude and the logarithmic relationship between sound pressure and sound level or sound intensity and sound level (under normal conditions) can be worked out in the classroom. You can find experiment instructions for this at www.spaichinger-schallpegelmesser.de.
Please: I would be happy if you could contact me by email (Ziegler@spaichinger-schallpegelmesser.de) if you have any problems. That way we could clarify the problems quickly and precisely.
This freeware app has 9 windows that can be displayed as single or double windows:
o Storage oscilloscope: the course of the sound pressure as a function of time
o Frequency spectrum (FFT)
o Fundamental frequency of a sound (in Hz) and indication of the associated musical note
o Double tone generator for the simultaneous generation of up to two different tones with phase shift (e.g. for beats)
o Pulse generator to generate "cracking noises" (e.g. for the speed of sound)
o Noise lights
o Effective sound pressure (in Pa) and sound intensity under normal conditions
o Sound pressure level (in dB)
o A-weighted sound pressure level (in dB (A))
In addition, sound examinations can be carried out with the help of the enclosed wave recordings of musical instruments. In this musical instrument collection you will also find the wonderful overtone singing by Wolfgang Saus.
The measurements can be saved, opened and sent as a wave file (via Bluetooth, e-mail, ...). Playback is also possible, i.e. the sound recording can be listened to again while the wave file is being played, whereby all values are displayed as during the recording at the same time.
Sending the values as a CSV file is also possible.
The basic frequency of a sound determined by the app with great accuracy (deviation: max. 0.2 Hz) is helpful for analyzing musical instruments or voices of musical instruments. In addition to the base frequency, the musical note and the frequency of the note that is close to the base frequency are displayed. This enables musical instruments (especially guitars) to be tuned easily and precisely.
The graphs can be zoomed as required.
With the "Extended measurement fast" option, recordings with a maximum length of 60 seconds can be made, which can be analyzed in detail manually after the recording.
The sound level values (including effective sound pressure and sound intensity) are not particularly accurate, as the built-in microphones do not have a constant frequency response and no omnidirectional characteristics. The sound level values can be calibrated (one-point calibration), but this does not change the quality of the built-in microphones. An external measurement microphone should be used to obtain more accurate results. The sound level values are nevertheless helpful for physics lessons, as they can convey a feeling for the order of magnitude and the logarithmic relationship between sound pressure and sound level or sound intensity and sound level (under normal conditions) can be worked out in the classroom. You can find experiment instructions for this at www.spaichinger-schallpegelmesser.de.
Please: I would be happy if you could contact me by email (Ziegler@spaichinger-schallpegelmesser.de) if you have any problems. That way we could clarify the problems quickly and precisely.
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