Fig. 7From: Loudness stability of binaural sound with spherical harmonic representation of sparse head-related transfer functionsBox plot of scores under truncation (a) and sparsity (b) conditions for loudness stability evaluation. Each box represents a different \((Q,\widetilde {N})\) condition. The box bounds the interquartile range (IQR) divided by the median, and Tukey-style whiskers extend to a maximum of 1.5 × IQR beyond the box. The notches refer to a 95% confidence interval [63]Back to article page