Non-personalized HRIR databases with and without floor reflections

Non-personalized HRIR databases in SOFA format [1] with and without floor reflections. Floor reflections were simulated with a plywood board between a Head-And-Torso Simulator (HATS) and a dodecahedral loudspeaker. These recordings were captured at the anechoic chamber of the University of Aizu.

Apparatus

Head and Torso Simulator (HATS): 5128-C (Brüel & Kjær—B&K, Denmark).

Preamplifier:  NEXUS preamplifier (B&K).

Audio interface: Babyface (RME, Germany).

Software used: ScanIR [2].

Loudspeaker: Self-built regular dodecahedral loudspeaker (7.2 kg). This could be circumscribed by a sphere of 25 cm in diameter. Drivers (P800K—FOSTEX, Japan) were attached to 3 mm acrylic plates.

Audio source: A one-second sine-sweep tone sampled at 96 kHz generated with ScanIR.

Floor simulation: Plywood board 181x91x1.2 cm weighing 13 kg (density ρ = 658 kg/m3  i.e., a relatively firm board).

Locations: 72 azimuths from 0º to 355º in steps of 5º (counterclockwise measured) with a combination of elevation φ = [±60º, ±30º, 0º] at a distance of 153 cm from the center of the HATS’ head to the center of the loudspeaker.

Other details on the procedure and how this was used in our research are found in [3]. HRIRs were capture with and without the plywood board. they are called here “echoic” and “anechoic,”  respectively. In addition to the original sampling rate, we include here resampled versions at 44.1 and 48 kHz.

Filenames

For both anechoic and echoic databases, download:
AizuEle@[sample rate].zip

Other SOFA files:
AizuEle[XXX]@[sample rate].sofa, replace ‘XXX’ with ‘WIF’ for echoic recordings and with ‘WOF’ for anechoic ones.