convSPL               package:seewave               R Documentation

_C_o_n_v_e_r_t _s_o_u_n_d _p_r_e_s_s_u_r_e _l_e_v_e_l _i_n _o_t_h_e_r _u_n_i_t_s

_D_e_s_c_r_i_p_t_i_o_n:

     This functions converts sound pressure level (in dB) in sound
     power (Watt), intensity (Watt/m2) and pressure (Pa). By default,
     these conversions are applied to air-borne sound.

_U_s_a_g_e:

     convSPL(x, d = 1, Iref = 10^-12, pref = 2*10^-5)

_A_r_g_u_m_e_n_t_s:

       x: a numeric vector or a matrix describind SPL values (in dB).

       d: the distance from the sound source where SPL values have been
          measured (in meter) (by default = 1m)

    Iref: reference intensity (in Watt/m2) (by default = 10e-12)

    pref: reference pressure (in Pa) (by default = 2.10e-5)

_D_e_t_a_i_l_s:

     ~~ If necessary, more details than the description above ~~

_V_a_l_u_e:

     'convSPL' returns a list containing three components: 

       P: data converted in sound power (in Watt).

       I: data converted in sound intensity (in Watt/m2).

       p: data converted in sound pressure (in Pa).

_N_o_t_e:

     'Iref' and 'pref' correspond to a 1 kHz sound in air.

_A_u_t_h_o_r(_s):

     Jrme Sueur jerome.sueur@ibaic.u-psud.fr

_R_e_f_e_r_e_n_c_e_s:

     Hartmann, W. M. 1998 _Signals, sound and sensation_. New York:
     Springer.

_S_e_e _A_l_s_o:

     'moredB', 'attenuation'

_E_x_a_m_p_l_e_s:

     # conversion of two SPL measurements taken at 0.5 m from the source
     convSPL(c(80,85),d=0.5) 

