Table 1
Comparison of previously measured individual HARTF databases with the presented database.
| Database abbreviation | OlHeaD-HRTF [5] | Hearpiece [28] | OTIMP [29] | IHTA-indHARTF [42] |
|---|---|---|---|---|
| Number of participants and artificial heads |
16 (6 f, 10 m), 3 artificial heads (HATS, KEMAR, 1 custom-made) |
25 (11 f, 14 m), 1 artificial head (KEMAR) |
41 (14 f, 27 m), 4 artificial heads (1 HATS measured twice, 3 custom-made) |
30 (8 f, 22 m) |
| Age of participants (yrs) |
20–36 |
21–60 (μ ± σ: 30.4 ± 7.3) |
25–69 (μ ± σ: 41.6 ± 10.9) |
22–43 (μ ± σ: 28.9 ± 6.1) |
| HA-device styles |
3 ITE, 1 BTE |
1 ITE |
1 BTE |
1 BTE |
| Number of microphones per HA device |
ITE 1: 3; ITE 2: 2; ITE 3: 3; BTE: 3 |
4 |
2 |
2 |
| Placement and number of other microphones per ear |
Eardrum: 1; blocked ear-canal entrance: 1; insert headphones: 1 |
Eardrum: 1 |
Blocked ear-canal entrance: 1 |
Blocked ear-canal entrance: 1 |
| Sampling rate (kHz) |
48 |
44.1 |
44.1 |
44.1 |
| Filter length (samples) |
256 |
356 |
472 |
256 |
| Measurement directions |
91 directions in total: 48 directions with 7.5 deg spatial resolution in the horizontal plane; 24 and 6 directions lying on horizontal rings at ±30 deg and 60 deg elevation with 30 deg and 60 deg azimuth resolution, respectively; 1 direction at the north pole; 8 additional directions in the median plane to obtain a vertical spatial resolution of 10 deg between ±30 deg elevation; 2 additional sagittal plane directions each at azimuth 30 deg and 150 deg and ±15 deg elevation (4 in total). |
87 directions in total: 48 directions with 7.5 deg spatial resolution in the horizontal plane; 24 and 6 directions lying on horizontal rings at elevation angles of ±30 deg and 60 deg with 30 deg and 60 deg azimuth resolution, respectively; 1 direction at the north pole; 8 additional directions in the median plane to obtain a vertical spatial resolution of 15 deg above −30 deg elevation. |
85 directions in total: 16 directions with 22.5 deg azimuth resolution in the horizontal plane; two horizontal rings at ±45 deg, each with 6 directions and 60 deg azimuth resolution; 1 direction at the north pole; 3 of the participant azimuth orientations at 0 deg, −15 deg, −30 deg, resulting in azimuth resolutions of 7.5 deg in the horizontal plane, and 30 deg in the two other horizontal rings. |
9217 directions in total: Equiangular sampling with a spatial resolution of 2.5 deg × 2.5 deg in azimuth and elevation, covering all-round directions between elevation angles above and below−70 deg and 90 deg, respectively. |
| Measurement radius (m) |
2.5–3 |
2.5–3 |
1.9 |
1.2 |
| Measurement environment |
Anechoic chamber |
Anechoic chamber |
Acoustically treated room (250 ms mean reverberation time) |
Hemi-anechoic chamber |
| Data formats |
Custom MAT, SOFA [46] |
Custom MAT, SOFA [46] |
Custom MAT |
OpenDAFF [47], SOFA [46] |
| License | CC BY-NC-SA 4.0 | CC BY-SA 4.0 | CC BY 4.0 | CC BY-SA 4.0 |
Note: This table makes no claim to completeness. μ and σ represent mean and standard deviation, respectively. Participants are separated into female (f) and male (m). The listed HA-device styles include in-the-ear (ITE) and behind-the-ear (BTE) devices. Two commonly used artificial heads are referred to with the abbreviations HATS (TYPE 4128-C Head and Torso Simulator, Brüel & Kjær, Nærum, Denmark) and KEMAR (45BB Head & Torso, G.R.A.S. Sound & Vibration A/S, Holte, Denmark).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.