Detection of burst gravitational waves will not be affected by the detector sensitivity at 10-40 Hz, but the extraction of physics may be affected once the gravitational wave signals are obtained. Several explosion models of supernovae, such as magnetohydrodynamic (MHD) explosion [40] and neutrino-driven convection with Standing Accretion Shock Instability (SASI) [41], provide gravitational waves with low frequency components (below 100 Hz). Figure 1.13 shows gravitational wave spectra in explosion models with SASI [41]. The spectrum shape below 50 Hz is affected by the initial condition of the explosion models. Hence improved sensitivity at low frequencies can contribute in determining astronomical parameters and distinguishing explosion mechanisms of supernovae.