Handheld Binaural
Recorder
The product, equipment, and automotive sounds on this page have been
recorded using the ViAcoustics Handheld Binaural Recording System (HBR) and
are encoded so as to allow analysis using the Nelson Acoustical Engineering
Sound Quality Analyzer demonstration software. Click on the link associated
with each sound to launch your default WAV file player and hear the sounds.
Right click on the link and Save Target As to save the sound for use in the
Sound Quality Analyzer.
Ambient Noise in Hemi-Anechoic Chamber. Approximately 15 dBA with normal speaking voice track to assist you with first setting the volume for listening and then hearing the background noise level of the recording system.
Voice Tracks (10,817k wav file)
Computer boot up sequence with disk rub_72 dB normalization (3,969k wav file)
Recordings of normal speech level voice tracks in hemi-anechoic chamber.
This is a recording of the boot up sequence of an older PC system. The disk drive on this machine periodically “rubs” during the boot up sequence. It is interesting to see this rub in the STFT or Non-Stationary Loudness in the Nelson Acoustical Engineering Sound Quality Demo. The level is about 40 dBA SPL at the standard ISO 7779 operators position.
Microdrive disk access noise_72 dB normalization (2,753k wav file)
This is a recording of a Compact Flash microdrive at about ˝ meter, made in the anechoic chamber with an ambient noise level of about 18 dBA. The overall recording level analyzes at about 20 dBA at ˝ meter from the drive. Note the fidelity of the drive clicks from this very small device, even when it barely elevates the overall ambient noise level in the chamber.Household Airfilter at 3 ft 74 dB Normalization (519k wav file)
Washing Machine Fill at 74 dB Normalization (582k wav file)
Washing Machine Wash Cycle at 90 dB Normalization (730k wav file)
Toilet Flush and Fill at 90 dB Normalization (2883k wav file)
(These links should launch your WAV file player, download the file, and play it. You can then save it to your local system.)
